#A9D400
Closest named color: Slime Green (#99CC04). oklch(81% 0.199 123.1), rgb(169, 212, 0).
Aa
Black text reads best on this color (12.10:1).
About this color
#A9D400 is a light, vivid yellow. In OKLCH its lightness is 81%, its chroma 0.199 and its hue 123°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slime Green (#99CC04), ΔE 0.031 away. Black text reads best on it, at 12.10:1.
| Hue family | Yellows |
| Lightness | light (81%) |
| Chroma | vivid (0.199) |
| Temperature | in between |
| Nearest name | Slime Green (#99CC04) |
| Black text | 12.10:1 |
| White text | 1.73:1 |
Values
| HEX | #A9D400 |
| RGB | rgb(169, 212, 0) |
| HSL | hsl(72, 100%, 42%) |
| OKLCH | oklch(81% 0.199 123.1) |
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 #A9D400 | 1.73:1 | Fails | Lc -35.1 | Non-text elements, placeholder text |
| Black text on #A9D400 | 12.10:1 | AAA | Lc 72.6 | Content text, not long reading |
| #A9D400 text on white | 1.73:1 | Fails | Lc 31.2 | Non-text elements, placeholder text |
| #A9D400 text on black | 12.10:1 | AAA | Lc -71.5 | 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
#F2F9E5
oklch(97.1% 0.027 122.7)
-
Step 100
100
#E2F1C7
oklch(93.6% 0.057 123.5)
-
Step 200
200
#CBE693
oklch(88.6% 0.111 123.3)
-
Step 300
300 (this color)
#A9D400
oklch(81% 0.199 123.1)
-
Step 400
400
#8CB100
oklch(70.7% 0.174 123.3)
-
Step 500
500
#789800
oklch(63.2% 0.156 123.3)
-
Step 600
600
#647F00
oklch(55.5% 0.136 123.2)
-
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
#384900
oklch(37.7% 0.093 123.4)
-
Step 950
950
#202B00
oklch(26.9% 0.066 123.3)
#A9D400 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) | #E1C600 | 0.082 |
| Deuteranopia (no green cones) | #DCC42A | 0.083 |
| Tritanopia (no blue cones) | #B2C9B4 | 0.165 |
| Achromatopsia (no color) | #C5C5C5 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A9D400
#A9D400
oklch(81% 0.199 123.1)
- #D0AEFF
#D0AEFF
oklch(80.9% 0.117 303.1)
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 #A9D400, closest first.
No curated palette has a color within ΔE 0.04 of #A9D400.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slime Green #99CC04 ΔE 0.031
- Yellow Green #9ACD32 ΔE 0.031
- Kiwi Green #8EE53F ΔE 0.047
- Pea #A4BF20 ΔE 0.059
- Apple Green #76CD26 ΔE 0.061
- Fresh Green #69D84F ΔE 0.063
- Kiwi #9CEF43 ΔE 0.068
- Toxic Green #61DE2A ΔE 0.069
Use #A9D400 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.