#B12E10
Closest named color: Rusty Red (#AF2F0D). oklch(50.4% 0.172 33.6), rgb(177, 46, 16).
Aa
White text reads best on this color (6.42:1).
About this color
#B12E10 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.172 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.004 away. White text reads best on it, at 6.42:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.172) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #B12E10 |
| RGB | rgb(177, 46, 16) |
| HSL | hsl(11, 83%, 38%) |
| OKLCH | oklch(50.4% 0.172 33.6) |
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 #B12E10 | 6.42:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #B12E10 | 3.26:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #B12E10 text on white | 6.42:1 | AA | Lc 80.6 | Fine for body text |
| #B12E10 text on black | 3.26:1 | AA large text | Lc -21.3 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F6CFC6
oklch(88.5% 0.046 33.2)
-
Step 300
300
#F1AD9E
oklch(80.8% 0.083 32.8)
-
Step 400
400
#E77F68
oklch(70.7% 0.133 33.5)
-
Step 500
500
#DD5A3E
oklch(63.2% 0.17 33.7)
-
Step 600
600
#C83919
oklch(55.6% 0.185 33.7)
-
Step 700
700 (this color)
#B12E10
oklch(50.4% 0.172 33.6)
-
Step 800
800
#8C250E
oklch(42.7% 0.142 33.7)
-
Step 900
900
#712515
oklch(37.8% 0.111 33.6)
-
Step 950
950
#42170D
oklch(27% 0.07 34.5)
#B12E10 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) | #574C08 | 0.180 |
| Deuteranopia (no green cones) | #776903 | 0.163 |
| Tritanopia (no blue cones) | #C40029 | 0.054 |
| Achromatopsia (no color) | #5F5F5F | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B12E10
#B12E10
oklch(50.4% 0.172 33.6)
- #007183
#007183
oklch(50.4% 0.089 213.7)
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 #B12E10, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.004
- Rust Red #AA2704 ΔE 0.020
- Rufous #AE2012 ΔE 0.021
- Firebrick #B22222 ΔE 0.023
- Brick #A03623 ΔE 0.034
- Brown #A52A2A ΔE 0.035
- Russet #A13905 ΔE 0.035
- Sinopia #BB3E03 ΔE 0.038
Use #B12E10 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.