#A3C601
Closest named color: Slime Green (#99CC04). oklch(77.3% 0.186 121.6), rgb(163, 198, 1).
Aa
Black text reads best on this color (10.63:1).
About this color
#A3C601 is a medium-light, vivid yellow. In OKLCH its lightness is 77%, its chroma 0.186 and its hue 122°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slime Green (#99CC04), ΔE 0.019 away. Black text reads best on it, at 10.63:1.
| Hue family | Yellows |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.186) |
| Temperature | in between |
| Nearest name | Slime Green (#99CC04) |
| Black text | 10.63:1 |
| White text | 1.97:1 |
Values
| HEX | #A3C601 |
| RGB | rgb(163, 198, 1) |
| HSL | hsl(71, 99%, 39%) |
| OKLCH | oklch(77.3% 0.186 121.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #A3C601 | 1.97:1 | Fails | Lc -42.3 | Non-text elements, placeholder text |
| Black text on #A3C601 | 10.63:1 | AAA | Lc 66.0 | Content text, not long reading |
| #A3C601 text on white | 1.97:1 | Fails | Lc 37.9 | Non-text elements, placeholder text |
| #A3C601 text on black | 10.63:1 | AAA | Lc -64.5 | Content text, not long reading |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.
-
Step 50
50
#F2F8E6
oklch(97% 0.025 121.9)
-
Step 100
100
#E4F0C8
oklch(93.6% 0.054 121)
-
Step 200
200
#CEE496
oklch(88.4% 0.104 121.4)
-
Step 300
300 (this color)
#A3C601
oklch(77.3% 0.186 121.6)
-
Step 400
400
#90B000
oklch(70.8% 0.171 121.8)
-
Step 500
500
#7B9700
oklch(63.2% 0.153 121.9)
-
Step 600
600
#677E00
oklch(55.5% 0.134 121.5)
-
Step 700
700
#566A00
oklch(49% 0.118 121.7)
-
Step 800
800
#465700
oklch(42.7% 0.103 121.8)
-
Step 900
900
#3A4800
oklch(37.6% 0.091 121.4)
-
Step 950
950
#222B00
oklch(27.1% 0.065 121.1)
#A3C601 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #D3B900 | 0.073 |
| Deuteranopia (no green cones) | #CEB927 | 0.071 |
| Tritanopia (no blue cones) | #ADBBA8 | 0.157 |
| Achromatopsia (no color) | #B8B8B8 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3C601
#A3C601
oklch(77.3% 0.186 121.6)
- #C59FFF
#C59FFF
oklch(77.3% 0.139 301.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #A3C601, closest first.
No curated palette has a color within ΔE 0.04 of #A3C601.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slime Green #99CC04 ΔE 0.019
- Yellow Green #9ACD32 ΔE 0.020
- Pea #A4BF20 ΔE 0.022
- Bright Olive #9CBB04 ΔE 0.032
- Mustard Green #A8B504 ΔE 0.046
- Apple Green #76CD26 ΔE 0.049
- Dark Lime Green #7EBD01 ΔE 0.053
- Apple #6ECB3C ΔE 0.055
Use #A3C601 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.