#B3563B
Closest named color: Burnt Siena (#B75203). oklch(56.3% 0.128 37), rgb(179, 86, 59).
Aa
White text reads best on this color (4.87:1).
About this color
#B3563B is a medium-dark, moderately saturated red. In OKLCH its lightness is 56%, its chroma 0.128 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.035 away. White text reads best on it, at 4.87:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.128) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.31:1 |
| White text | 4.87:1 |
Values
| HEX | #B3563B |
| RGB | rgb(179, 86, 59) |
| HSL | hsl(14, 50%, 47%) |
| OKLCH | oklch(56.3% 0.128 37) |
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 #B3563B | 4.87:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #B3563B | 4.31:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #B3563B text on white | 4.87:1 | AA | Lc 73.3 | Content text, not long reading |
| #B3563B text on black | 4.31:1 | AA large text | Lc -28.4 | Dividers and decoration only |
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
#F5E6E2
oklch(93.6% 0.017 35.3)
-
Step 200
200
#EDD2CA
oklch(88.4% 0.032 37.1)
-
Step 300
300
#E3B4A7
oklch(80.9% 0.058 36)
-
Step 400
400
#D38C77
oklch(70.7% 0.093 37.2)
-
Step 500
500
#C56E54
oklch(63.1% 0.117 37.4)
-
Step 600
600 (this color)
#B3563B
oklch(56.3% 0.128 37)
-
Step 700
700
#98442B
oklch(49.2% 0.119 37.2)
-
Step 800
800
#7B3825
oklch(42.6% 0.099 36.7)
-
Step 900
900
#643123
oklch(37.7% 0.077 36.3)
-
Step 950
950
#3B1D15
oklch(27% 0.049 35.8)
#B3563B 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) | #6F6538 | 0.125 |
| Deuteranopia (no green cones) | #857939 | 0.116 |
| Tritanopia (no blue cones) | #C44450 | 0.058 |
| Achromatopsia (no color) | #717171 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B3563B
#B3563B
oklch(56.3% 0.128 37)
- #00839C
#00839C
oklch(56.3% 0.101 217.4)
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 #B3563B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.035
- Burnt Orange #C04E01 ΔE 0.040
- Brick Orange #C14A09 ΔE 0.040
- Cinnamon #AC4F06 ΔE 0.041
- Sienna #A0522D ΔE 0.042
- Copper #B66325 ΔE 0.043
- Earth #A2653E ΔE 0.044
- Rust Orange #C45508 ΔE 0.044
Use #B3563B 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.