#B63611
Closest named color: Rusty Red (#AF2F0D). oklch(52.1% 0.17 35.4), rgb(182, 54, 17).
Aa
White text reads best on this color (5.95:1).
About this color
#B63611 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.170 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.020 away. White text reads best on it, at 5.95:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #B63611 |
| RGB | rgb(182, 54, 17) |
| HSL | hsl(13, 83%, 39%) |
| OKLCH | oklch(52.1% 0.17 35.4) |
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 #B63611 | 5.95:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #B63611 | 3.52:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #B63611 text on white | 5.95:1 | AA | Lc 78.6 | Fine for body text |
| #B63611 text on black | 3.52:1 | AA large text | Lc -23.2 | 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 700.
-
Step 50
50
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F6CFC5
oklch(88.5% 0.046 34.7)
-
Step 300
300
#F1AE9C
oklch(80.9% 0.083 35.6)
-
Step 400
400
#E68066
oklch(70.6% 0.132 35.3)
-
Step 500
500
#DC5B3A
oklch(63.1% 0.169 35.4)
-
Step 600
600
#C73B12
oklch(55.6% 0.183 35.4)
-
Step 700
700 (this color)
#B63611
oklch(52.1% 0.17 35.4)
-
Step 800
800
#8B2609
oklch(42.6% 0.141 35.2)
-
Step 900
900
#702612
oklch(37.7% 0.109 35.8)
-
Step 950
950
#42170C
oklch(27% 0.07 35.4)
#B63611 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) | #5D5108 | 0.176 |
| Deuteranopia (no green cones) | #7C6E05 | 0.160 |
| Tritanopia (no blue cones) | #C90030 | 0.064 |
| Achromatopsia (no color) | #646464 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B63611
#B63611
oklch(52.1% 0.17 35.4)
- #00768A
#00768A
oklch(52.1% 0.092 214.9)
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 #B63611, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.020
- Sinopia #BB3E03 ΔE 0.020
- Firebrick #B22222 ΔE 0.037
- Rust Red #AA2704 ΔE 0.037
- Rufous #AE2012 ΔE 0.039
- Dull Red #BB3F3F ΔE 0.041
- Russet #A13905 ΔE 0.043
- Brick #A03623 ΔE 0.046
Use #B63611 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.