#B3603C
Closest named color: Copper (#B66325). oklch(57.9% 0.119 43.3), rgb(179, 96, 60).
Aa
Black text reads best on this color (4.65:1).
About this color
#B3603C is a medium-dark, moderately saturated brown. In OKLCH its lightness is 58%, its chroma 0.119 and its hue 43°. Its hue sits on the warm side of the wheel. The nearest named color is Copper (#B66325), ΔE 0.025 away. Black text reads best on it, at 4.65:1.
| Hue family | Browns |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.119) |
| Temperature | warm |
| Nearest name | Copper (#B66325) |
| Black text | 4.65:1 |
| White text | 4.51:1 |
Values
| HEX | #B3603C |
| RGB | rgb(179, 96, 60) |
| HSL | hsl(18, 50%, 47%) |
| OKLCH | oklch(57.9% 0.119 43.3) |
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 #B3603C | 4.51:1 | AA | Lc -76.4 | Fine for body text |
| Black text on #B3603C | 4.65:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #B3603C text on white | 4.51:1 | AA | Lc 70.9 | Content text, not long reading |
| #B3603C text on black | 4.65:1 | AA | Lc -30.7 | 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
#EBD3CA
oklch(88.4% 0.03 41.7)
-
Step 300
300
#DFB6A5
oklch(80.8% 0.053 43.7)
-
Step 400
400
#CE8F75
oklch(70.6% 0.086 43.3)
-
Step 500
500
#C07251
oklch(63% 0.109 43.3)
-
Step 600
600 (this color)
#B3603C
oklch(57.9% 0.119 43.3)
-
Step 700
700
#934928
oklch(49.2% 0.11 43.4)
-
Step 800
800
#773C22
oklch(42.6% 0.091 43.4)
-
Step 900
900
#613421
oklch(37.8% 0.072 43.1)
-
Step 950
950
#391F14
oklch(27.1% 0.045 43.4)
#B3603C 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) | #766B38 | 0.110 |
| Deuteranopia (no green cones) | #8A7E3B | 0.101 |
| Tritanopia (no blue cones) | #C45058 | 0.064 |
| Achromatopsia (no color) | #767676 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B3603C
#B3603C
oklch(57.9% 0.119 43.3)
- #0087A9
#0087A9
oklch(57.9% 0.108 223.7)
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 #B3603C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Copper #B66325 ΔE 0.025
- Clay #B66A50 ΔE 0.029
- Earth #A2653E ΔE 0.032
- Adobe #BD6C48 ΔE 0.036
- Orangey Brown #B16002 ΔE 0.038
- Burnt Siena #B75203 ΔE 0.039
- Clay Brown #B2713D ΔE 0.042
- Umber #B26400 ΔE 0.042
Use #B3603C 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.