#B66540
Closest named color: Clay (#B66A50). oklch(59.2% 0.116 44.4), rgb(182, 101, 64).
Aa
Black text reads best on this color (4.92:1).
About this color
#B66540 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 59%, its chroma 0.116 and its hue 44°. Its hue sits on the warm side of the wheel. The nearest named color is Clay (#B66A50), ΔE 0.019 away. Black text reads best on it, at 4.92:1.
| Hue family | Browns |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.116) |
| Temperature | warm |
| Nearest name | Clay (#B66A50) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #B66540 |
| RGB | rgb(182, 101, 64) |
| HSL | hsl(19, 48%, 48%) |
| OKLCH | oklch(59.2% 0.116 44.4) |
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 #B66540 | 4.26:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #B66540 | 4.92:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #B66540 text on white | 4.26:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #B66540 text on black | 4.92:1 | AA | Lc -32.5 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F3E7E2
oklch(93.6% 0.015 44.2)
-
Step 200
200
#EBD4CA
oklch(88.6% 0.029 45)
-
Step 300
300
#DFB7A5
oklch(81% 0.053 45.5)
-
Step 400
400
#CD9075
oklch(70.7% 0.084 44.8)
-
Step 500
500
#BF7351
oklch(63.1% 0.107 44.5)
-
Step 600
600 (this color)
#B66540
oklch(59.2% 0.116 44.4)
-
Step 700
700
#924A28
oklch(49.2% 0.108 44.5)
-
Step 800
800
#763D22
oklch(42.6% 0.089 44.8)
-
Step 900
900
#603421
oklch(37.6% 0.07 43.6)
-
Step 950
950
#381F14
oklch(27% 0.044 44.2)
#B66540 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) | #7B703C | 0.105 |
| Deuteranopia (no green cones) | #8E813F | 0.096 |
| Tritanopia (no blue cones) | #C7565C | 0.063 |
| Achromatopsia (no color) | #7A7A7A | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B66540
#B66540
oklch(59.2% 0.116 44.4)
- #008BAF
#008BAF
oklch(59.2% 0.112 224.4)
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 #B66540, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clay #B66A50 ΔE 0.019
- Adobe #BD6C48 ΔE 0.023
- Copper #B66325 ΔE 0.024
- Clay Brown #B2713D ΔE 0.031
- Terra Cotta #C9643B ΔE 0.034
- Tiger's Eye #BC6C25 ΔE 0.035
- Earth #A2653E ΔE 0.037
- Terracotta #CA6641 ΔE 0.037
Use #B66540 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.