#A1C738
Closest named color: Yellow Green (#9ACD32). oklch(77.6% 0.17 123.5), rgb(161, 199, 56).
Aa
Black text reads best on this color (10.74:1).
About this color
#A1C738 is a medium-light, vivid yellow. In OKLCH its lightness is 78%, its chroma 0.170 and its hue 123°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Yellow Green (#9ACD32), ΔE 0.019 away. Black text reads best on it, at 10.74:1.
| Hue family | Yellows |
| Lightness | medium-light (78%) |
| Chroma | vivid (0.170) |
| Temperature | in between |
| Nearest name | Yellow Green (#9ACD32) |
| Black text | 10.74:1 |
| White text | 1.95:1 |
Values
| HEX | #A1C738 |
| RGB | rgb(161, 199, 56) |
| HSL | hsl(76, 56%, 50%) |
| OKLCH | oklch(77.6% 0.17 123.5) |
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 #A1C738 | 1.95:1 | Fails | Lc -41.8 | Non-text elements, placeholder text |
| Black text on #A1C738 | 10.74:1 | AAA | Lc 66.5 | Content text, not long reading |
| #A1C738 text on white | 1.95:1 | Fails | Lc 37.5 | Non-text elements, placeholder text |
| #A1C738 text on black | 10.74:1 | AAA | Lc -65.0 | 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
#CDE49E
oklch(88.5% 0.095 123.1)
-
Step 300
300 (this color)
#A1C738
oklch(77.6% 0.17 123.5)
-
Step 400
400
#8CB100
oklch(70.7% 0.174 123.3)
-
Step 500
500
#779800
oklch(63.1% 0.156 123.6)
-
Step 600
600
#647F00
oklch(55.5% 0.136 123.2)
-
Step 700
700
#536B00
oklch(49% 0.121 123.6)
-
Step 800
800
#445800
oklch(42.8% 0.106 123.5)
-
Step 900
900
#384900
oklch(37.7% 0.093 123.4)
-
Step 950
950
#202B00
oklch(26.9% 0.066 123.3)
#A1C738 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) | #D2BA1E | 0.070 |
| Deuteranopia (no green cones) | #CDB944 | 0.072 |
| Tritanopia (no blue cones) | #A9BDAB | 0.140 |
| Achromatopsia (no color) | #B9B9B9 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A1C738
#A1C738
oklch(77.6% 0.17 123.5)
- #C99FFF
#C99FFF
oklch(77.7% 0.14 303.4)
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 #A1C738, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Yellow Green #9ACD32 ΔE 0.019
- Pea #A4BF20 ΔE 0.021
- Slime Green #99CC04 ΔE 0.029
- Bright Olive #9CBB04 ΔE 0.035
- Light Olive Green #A4BE5C ΔE 0.044
- Mustard Green #A8B504 ΔE 0.046
- Apple Green #76CD26 ΔE 0.053
- Apple #6ECB3C ΔE 0.054
Use #A1C738 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.