#BBB51D
Closest named color: Olive Yellow (#C2B709). oklch(75.4% 0.155 107.1), rgb(187, 181, 29).
Aa
Black text reads best on this color (9.74:1).
About this color
#BBB51D is a medium-light, vivid yellow. In OKLCH its lightness is 75%, its chroma 0.155 and its hue 107°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Yellow (#C2B709), ΔE 0.013 away. Black text reads best on it, at 9.74:1.
| Hue family | Yellows |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.155) |
| Temperature | warm |
| Nearest name | Olive Yellow (#C2B709) |
| Black text | 9.74:1 |
| White text | 2.15:1 |
Values
| HEX | #BBB51D |
| RGB | rgb(187, 181, 29) |
| HSL | hsl(58, 73%, 42%) |
| OKLCH | oklch(75.4% 0.155 107.1) |
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 #BBB51D | 2.15:1 | Fails | Lc -46.9 | Large or bold text, headings |
| Black text on #BBB51D | 9.74:1 | AAA | Lc 61.8 | Content text, not long reading |
| #BBB51D text on white | 2.15:1 | Fails | Lc 42.2 | Non-text elements, placeholder text |
| #BBB51D text on black | 9.74:1 | AAA | Lc -60.0 | 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 400.
-
Step 50
50
#F6F6EC
oklch(97% 0.013 106.6)
-
Step 100
100
#EBECD6
oklch(93.6% 0.029 109.1)
-
Step 200
200
#DDDCB3
oklch(88.5% 0.054 106.3)
-
Step 300
300
#C7C57A
oklch(80.8% 0.097 107.1)
-
Step 400
400 (this color)
#BBB51D
oklch(75.4% 0.155 107.1)
-
Step 500
500
#938E00
oklch(63.1% 0.135 107.2)
-
Step 600
600
#7C7700
oklch(55.6% 0.119 106.8)
-
Step 700
700
#686400
oklch(49.1% 0.105 107)
-
Step 800
800
#555200
oklch(42.8% 0.092 107.3)
-
Step 900
900
#474400
oklch(37.7% 0.081 106.8)
-
Step 950
950
#2A2800
oklch(27% 0.058 106.8)
#BBB51D 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) | #C5AE00 | 0.021 |
| Deuteranopia (no green cones) | #C8B32D | 0.023 |
| Tritanopia (no blue cones) | #C9A89B | 0.142 |
| Achromatopsia (no color) | #B1B1B1 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BBB51D
#BBB51D
oklch(75.4% 0.155 107.1)
- #AAA1FF
#AAA1FF
oklch(75.4% 0.133 287.1)
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 #BBB51D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Yellow #C2B709 ΔE 0.013
- Muddy Yellow #BFAC05 ΔE 0.023
- Mustard #CEB301 ΔE 0.027
- Mustard Green #A8B504 ΔE 0.029
- Dark Yellow #D5B60A ΔE 0.039
- Pea #A4BF20 ΔE 0.039
- Mustard Yellow #D2BD0A ΔE 0.042
- Burnt Yellow #D5AB09 ΔE 0.044
Use #BBB51D 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.