#A1C538
Closest named color: Pea (#A4BF20). oklch(77.1% 0.168 123), rgb(161, 197, 56).
Aa
Black text reads best on this color (10.55:1).
About this color
#A1C538 is a medium-light, vivid yellow. In OKLCH its lightness is 77%, its chroma 0.168 and its hue 123°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Pea (#A4BF20), ΔE 0.017 away. Black text reads best on it, at 10.55:1.
| Hue family | Yellows |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.168) |
| Temperature | in between |
| Nearest name | Pea (#A4BF20) |
| Black text | 10.55:1 |
| White text | 1.98:1 |
Values
| HEX | #A1C538 |
| RGB | rgb(161, 197, 56) |
| HSL | hsl(75, 56%, 50%) |
| OKLCH | oklch(77.1% 0.168 123) |
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 #A1C538 | 1.98:1 | Fails | Lc -42.7 | Non-text elements, placeholder text |
| Black text on #A1C538 | 10.55:1 | AAA | Lc 65.6 | Content text, not long reading |
| #A1C538 text on white | 1.98:1 | Fails | Lc 38.3 | Non-text elements, placeholder text |
| #A1C538 text on black | 10.55:1 | AAA | Lc -64.1 | 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
#F2F8E8
oklch(97% 0.022 123.6)
-
Step 100
100
#E3F0CC
oklch(93.6% 0.049 123.5)
-
Step 200
200
#CDE49F
oklch(88.5% 0.094 123.3)
-
Step 300
300 (this color)
#A1C538
oklch(77.1% 0.168 123)
-
Step 400
400
#8DB100
oklch(70.8% 0.174 123)
-
Step 500
500
#789700
oklch(63% 0.154 123)
-
Step 600
600
#657F00
oklch(55.6% 0.136 122.8)
-
Step 700
700
#546B00
oklch(49.1% 0.121 123.1)
-
Step 800
800
#445800
oklch(42.8% 0.106 123.5)
-
Step 900
900
#394900
oklch(37.8% 0.092 122.7)
-
Step 950
950
#202B00
oklch(26.9% 0.066 123.3)
#A1C538 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) | #D0B91F | 0.067 |
| Deuteranopia (no green cones) | #CCB844 | 0.070 |
| Tritanopia (no blue cones) | #A9BBAA | 0.140 |
| Achromatopsia (no color) | #B8B8B8 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A1C538
#A1C538
oklch(77.1% 0.168 123)
- #C79DFF
#C79DFF
oklch(77.1% 0.142 302.9)
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 #A1C538, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pea #A4BF20 ΔE 0.017
- Yellow Green #9ACD32 ΔE 0.024
- Bright Olive #9CBB04 ΔE 0.031
- Slime Green #99CC04 ΔE 0.032
- Light Olive Green #A4BE5C ΔE 0.041
- Mustard Green #A8B504 ΔE 0.041
- Olive Yellow #C2B709 ΔE 0.052
- Apple Green #76CD26 ΔE 0.055
Use #A1C538 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.