#B12421
Closest named color: Firebrick (#B22222). oklch(49.6% 0.177 27.5), rgb(177, 36, 33).
Aa
White text reads best on this color (6.67:1).
About this color
#B12421 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.177 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.003 away. White text reads best on it, at 6.67:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.177) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #B12421 |
| RGB | rgb(177, 36, 33) |
| HSL | hsl(1, 69%, 41%) |
| OKLCH | oklch(49.6% 0.177 27.5) |
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 #B12421 | 6.67:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #B12421 | 3.14:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #B12421 text on white | 6.67:1 | AA | Lc 81.4 | Fine for body text |
| #B12421 text on black | 3.14:1 | AA large text | Lc -20.5 | 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
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC8
oklch(88.5% 0.047 27.8)
-
Step 300
300
#F3ACA2
oklch(80.9% 0.085 28)
-
Step 400
400
#EA7C70
oklch(70.7% 0.138 27.5)
-
Step 500
500
#E0554A
oklch(63.2% 0.176 27.7)
-
Step 600
600
#CB322D
oklch(55.6% 0.191 27.4)
-
Step 700
700 (this color)
#B12421
oklch(49.6% 0.177 27.5)
-
Step 800
800
#8E201C
oklch(42.7% 0.146 27.5)
-
Step 900
900
#72221D
oklch(37.7% 0.114 27.5)
-
Step 950
950
#431511
oklch(26.9% 0.072 27.9)
#B12421 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) | #51491F | 0.192 |
| Deuteranopia (no green cones) | #74671A | 0.174 |
| Tritanopia (no blue cones) | #C30025 | 0.039 |
| Achromatopsia (no color) | #5C5C5C | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B12421
#B12421
oklch(49.6% 0.177 27.5)
- #006F7B
#006F7B
oklch(49.5% 0.085 207.8)
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 #B12421, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.003
- Rufous #AE2012 ΔE 0.013
- Rusty Red #AF2F0D ΔE 0.023
- Rust Red #AA2704 ΔE 0.024
- Brown #A52A2A ΔE 0.024
- Scarlet #BE0119 ΔE 0.029
- Brick #A03623 ΔE 0.038
- Lipstick Red #C0022F ΔE 0.039
Use #B12421 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.