#B40C18
Closest named color: Firebrick (#B22222). oklch(48.8% 0.193 26.6), rgb(180, 12, 24).
Aa
White text reads best on this color (6.98:1).
About this color
#B40C18 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.193 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.016 away. White text reads best on it, at 6.98:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.193) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.00:1 |
| White text | 6.98:1 |
Values
| HEX | #B40C18 |
| RGB | rgb(180, 12, 24) |
| HSL | hsl(356, 88%, 38%) |
| OKLCH | oklch(48.8% 0.193 26.6) |
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 #B40C18 | 6.98:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #B40C18 | 3.00:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #B40C18 text on white | 6.98:1 | AA | Lc 81.9 | Fine for body text |
| #B40C18 text on black | 3.00:1 | AA large text | Lc -20.0 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E0
oklch(93.5% 0.028 25.9)
-
Step 200
200
#FACDC7
oklch(88.6% 0.052 27)
-
Step 300
300
#F7A9A0
oklch(80.8% 0.094 26.6)
-
Step 400
400
#EF776D
oklch(70.6% 0.15 26.4)
-
Step 500
500
#E64C46
oklch(63% 0.191 26.4)
-
Step 600
600
#D22226
oklch(55.6% 0.209 26.6)
-
Step 700
700 (this color)
#B40C18
oklch(48.8% 0.193 26.6)
-
Step 800
800
#931417
oklch(42.7% 0.16 26.6)
-
Step 900
900
#761C1A
oklch(37.7% 0.125 26.5)
-
Step 950
950
#461210
oklch(27% 0.08 26.2)
#B40C18 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) | #4C4315 | 0.212 |
| Deuteranopia (no green cones) | #72650C | 0.192 |
| Tritanopia (no blue cones) | #C70015 | 0.039 |
| Achromatopsia (no color) | #595959 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B40C18
#B40C18
oklch(48.8% 0.193 26.6)
- #006D78
#006D78
oklch(48.9% 0.084 207)
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 #B40C18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.016
- Rufous #AE2012 ΔE 0.019
- Scarlet #BE0119 ΔE 0.020
- Rust Red #AA2704 ΔE 0.032
- Lipstick Red #C0022F ΔE 0.033
- Brown #A52A2A ΔE 0.035
- Rusty Red #AF2F0D ΔE 0.037
- Rouge #AB1239 ΔE 0.039
Use #B40C18 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.