#BBB138
Closest named color: Muddy Yellow (#BFAC05). oklch(74.7% 0.138 104.6), rgb(187, 177, 56).
Aa
Black text reads best on this color (9.45:1).
About this color
#BBB138 is a medium-light, moderately saturated yellow. In OKLCH its lightness is 75%, its chroma 0.138 and its hue 105°. Its hue sits on the warm side of the wheel. The nearest named color is Muddy Yellow (#BFAC05), ΔE 0.020 away. Black text reads best on it, at 9.45:1.
| Hue family | Yellows |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.138) |
| Temperature | warm |
| Nearest name | Muddy Yellow (#BFAC05) |
| Black text | 9.45:1 |
| White text | 2.22:1 |
Values
| HEX | #BBB138 |
| RGB | rgb(187, 177, 56) |
| HSL | hsl(55, 54%, 48%) |
| OKLCH | oklch(74.7% 0.138 104.6) |
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 #BBB138 | 2.22:1 | Fails | Lc -48.4 | Large or bold text, headings |
| Black text on #BBB138 | 9.45:1 | AAA | Lc 60.3 | Content text, not long reading |
| #BBB138 text on white | 2.22:1 | Fails | Lc 43.6 | Non-text elements, placeholder text |
| #BBB138 text on black | 9.45:1 | AAA | Lc -58.5 | 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
#ECEBD8
oklch(93.6% 0.025 104.4)
-
Step 200
200
#DEDBB7
oklch(88.5% 0.048 103.4)
-
Step 300
300
#C9C482
oklch(80.9% 0.086 104.4)
-
Step 400
400 (this color)
#BBB138
oklch(74.7% 0.138 104.6)
-
Step 500
500
#978D00
oklch(63.2% 0.134 104.6)
-
Step 600
600
#7F7600
oklch(55.6% 0.118 104.3)
-
Step 700
700
#6A6300
oklch(49.1% 0.104 104.8)
-
Step 800
800
#575100
oklch(42.7% 0.09 104.7)
-
Step 900
900
#484300
oklch(37.6% 0.08 104.8)
-
Step 950
950
#2B2800
oklch(27.1% 0.058 105.3)
#BBB138 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) | #C1AB25 | 0.017 |
| Deuteranopia (no green cones) | #C4B040 | 0.016 |
| Tritanopia (no blue cones) | #C9A599 | 0.126 |
| Achromatopsia (no color) | #AEAEAE | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BBB138
#BBB138
oklch(74.7% 0.138 104.6)
- #A4A0FF
#A4A0FF
oklch(74.7% 0.135 284.5)
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 #BBB138, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muddy Yellow #BFAC05 ΔE 0.020
- Olive Yellow #C2B709 ΔE 0.029
- Mustard #CEB301 ΔE 0.033
- Burnt Yellow #D5AB09 ΔE 0.040
- Mustard Green #A8B504 ΔE 0.040
- Light Olive Green #A4BE5C ΔE 0.043
- Dark Yellow #D5B60A ΔE 0.044
- Dark Khaki #BDB76B ΔE 0.045
Use #BBB138 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.