#B5B121
Closest named color: Muddy Yellow (#BFAC05). oklch(74% 0.151 107.9), rgb(181, 177, 33).
Aa
Black text reads best on this color (9.27:1).
About this color
#B5B121 is a medium-light, vivid yellow. In OKLCH its lightness is 74%, its chroma 0.151 and its hue 108°. Its hue sits on the warm side of the wheel. The nearest named color is Muddy Yellow (#BFAC05), ΔE 0.018 away. Black text reads best on it, at 9.27:1.
| Hue family | Yellows |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.151) |
| Temperature | warm |
| Nearest name | Muddy Yellow (#BFAC05) |
| Black text | 9.27:1 |
| White text | 2.26:1 |
Values
| HEX | #B5B121 |
| RGB | rgb(181, 177, 33) |
| HSL | hsl(58, 69%, 42%) |
| OKLCH | oklch(74% 0.151 107.9) |
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 #B5B121 | 2.26:1 | Fails | Lc -49.3 | Large or bold text, headings |
| Black text on #B5B121 | 9.27:1 | AAA | Lc 59.5 | Large or bold text, headings |
| #B5B121 text on white | 2.26:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #B5B121 text on black | 9.27:1 | AAA | Lc -57.6 | 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
#DCDCB5
oklch(88.5% 0.052 107.4)
-
Step 300
300
#C6C67C
oklch(81% 0.096 108.4)
-
Step 400
400 (this color)
#B5B121
oklch(74% 0.151 107.9)
-
Step 500
500
#928E00
oklch(63% 0.136 107.7)
-
Step 600
600
#7B7800
oklch(55.7% 0.12 108)
-
Step 700
700
#676400
oklch(49% 0.105 107.7)
-
Step 800
800
#545200
oklch(42.7% 0.092 108.1)
-
Step 900
900
#464400
oklch(37.6% 0.081 107.8)
-
Step 950
950
#292800
oklch(26.9% 0.058 108.3)
#B5B121 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) | #C0AA00 | 0.022 |
| Deuteranopia (no green cones) | #C3AE2F | 0.025 |
| Tritanopia (no blue cones) | #C3A597 | 0.137 |
| Achromatopsia (no color) | #ACACAC | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B5B121
#B5B121
oklch(74% 0.151 107.9)
- #A79BFF
#A79BFF
oklch(74% 0.142 287.9)
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 #B5B121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muddy Yellow #BFAC05 ΔE 0.018
- Mustard Green #A8B504 ΔE 0.025
- Olive Yellow #C2B709 ΔE 0.027
- Mustard #CEB301 ΔE 0.038
- Pea #A4BF20 ΔE 0.043
- Bright Olive #9CBB04 ΔE 0.045
- Light Olive Green #A4BE5C ΔE 0.046
- Burnt Yellow #D5AB09 ΔE 0.049
Use #B5B121 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.