#B4D138
Closest named color: Yellow Green (#9ACD32). oklch(81.2% 0.174 120), rgb(180, 209, 56).
Aa
Black text reads best on this color (12.11:1).
About this color
#B4D138 is a light, vivid yellow. In OKLCH its lightness is 81%, its chroma 0.174 and its hue 120°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Yellow Green (#9ACD32), ΔE 0.036 away. Black text reads best on it, at 12.11:1.
| Hue family | Yellows |
| Lightness | light (81%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Yellow Green (#9ACD32) |
| Black text | 12.11:1 |
| White text | 1.73:1 |
Values
| HEX | #B4D138 |
| RGB | rgb(180, 209, 56) |
| HSL | hsl(71, 62%, 52%) |
| OKLCH | oklch(81.2% 0.174 120) |
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 #B4D138 | 1.73:1 | Fails | Lc -35.1 | Non-text elements, placeholder text |
| Black text on #B4D138 | 12.11:1 | AAA | Lc 72.6 | Content text, not long reading |
| #B4D138 text on white | 1.73:1 | Fails | Lc 31.3 | Non-text elements, placeholder text |
| #B4D138 text on black | 12.11:1 | 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
#F3F8E7
oklch(97.1% 0.023 120.2)
-
Step 100
100
#E5EFCA
oklch(93.5% 0.05 119.7)
-
Step 200
200
#D1E39A
oklch(88.5% 0.097 119.7)
-
Step 300
300 (this color)
#B4D138
oklch(81.2% 0.174 120)
-
Step 400
400
#94AE00
oklch(70.6% 0.167 119.8)
-
Step 500
500
#7F9600
oklch(63.3% 0.15 120)
-
Step 600
600
#6A7E00
oklch(55.7% 0.132 120.1)
-
Step 700
700
#596900
oklch(49% 0.116 119.6)
-
Step 800
800
#485600
oklch(42.6% 0.101 120)
-
Step 900
900
#3C4800
oklch(37.7% 0.09 119.9)
-
Step 950
950
#232B00
oklch(27.2% 0.064 120)
#B4D138 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) | #DEC518 | 0.061 |
| Deuteranopia (no green cones) | #DBC545 | 0.064 |
| Tritanopia (no blue cones) | #BEC6B4 | 0.148 |
| Achromatopsia (no color) | #C5C5C5 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B4D138
#B4D138
oklch(81.2% 0.174 120)
- #CCB1FF
#CCB1FF
oklch(81.1% 0.111 299.8)
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 #B4D138, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Yellow Green #9ACD32 ΔE 0.036
- Slime Green #99CC04 ΔE 0.044
- Pea #A4BF20 ΔE 0.054
- Pale Olive Green #B1D27B ΔE 0.057
- Mustard Yellow #D2BD0A ΔE 0.059
- Kiwi Green #8EE53F ΔE 0.063
- Light Moss Green #A6C875 ΔE 0.065
- Olive Yellow #C2B709 ΔE 0.066
Use #B4D138 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.