#B4B321
Closest named color: Mustard Green (#A8B504). oklch(74.4% 0.153 109.2), rgb(180, 179, 33).
Aa
Black text reads best on this color (9.41:1).
About this color
#B4B321 is a medium-light, vivid yellow. In OKLCH its lightness is 74%, its chroma 0.153 and its hue 109°. Its hue sits on the warm side of the wheel. The nearest named color is Mustard Green (#A8B504), ΔE 0.021 away. Black text reads best on it, at 9.41:1.
| Hue family | Yellows |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.153) |
| Temperature | warm |
| Nearest name | Mustard Green (#A8B504) |
| Black text | 9.41:1 |
| White text | 2.23:1 |
Values
| HEX | #B4B321 |
| RGB | rgb(180, 179, 33) |
| HSL | hsl(60, 69%, 42%) |
| OKLCH | oklch(74.4% 0.153 109.2) |
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 #B4B321 | 2.23:1 | Fails | Lc -48.6 | Large or bold text, headings |
| Black text on #B4B321 | 9.41:1 | AAA | Lc 60.1 | Content text, not long reading |
| #B4B321 text on white | 2.23:1 | Fails | Lc 43.8 | Non-text elements, placeholder text |
| #B4B321 text on black | 9.41:1 | AAA | Lc -58.3 | Large or bold text, headings |
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 400.
-
Step 50
50
#F6F6ED
oklch(97.1% 0.012 106.6)
-
Step 100
100
#EBECD7
oklch(93.7% 0.028 109.1)
-
Step 200
200
#DBDDB4
oklch(88.6% 0.054 109.8)
-
Step 300
300
#C5C67C
oklch(80.9% 0.096 109)
-
Step 400
400 (this color)
#B4B321
oklch(74.4% 0.153 109.2)
-
Step 500
500
#908F00
oklch(63% 0.137 109.3)
-
Step 600
600
#797800
oklch(55.5% 0.121 109.2)
-
Step 700
700
#666500
oklch(49.1% 0.107 109.1)
-
Step 800
800
#535200
oklch(42.6% 0.092 108.9)
-
Step 900
900
#454500
oklch(37.8% 0.082 109.8)
-
Step 950
950
#292800
oklch(26.9% 0.058 108.3)
#B4B321 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) | #C2AB00 | 0.026 |
| Deuteranopia (no green cones) | #C4B02F | 0.027 |
| Tritanopia (no blue cones) | #C1A799 | 0.138 |
| Achromatopsia (no color) | #ADADAD | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B4B321
#B4B321
oklch(74.4% 0.153 109.2)
- #AA9CFF
#AA9CFF
oklch(74.5% 0.141 289)
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 #B4B321, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mustard Green #A8B504 ΔE 0.021
- Muddy Yellow #BFAC05 ΔE 0.022
- Olive Yellow #C2B709 ΔE 0.024
- Pea #A4BF20 ΔE 0.037
- Mustard #CEB301 ΔE 0.038
- Bright Olive #9CBB04 ΔE 0.041
- Light Olive Green #A4BE5C ΔE 0.043
- Avocado #90B134 ΔE 0.049
Use #B4B321 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.