#B6151D
Closest named color: Firebrick (#B22222). oklch(49.6% 0.191 26.3), rgb(182, 21, 29).
Aa
White text reads best on this color (6.74:1).
About this color
#B6151D is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.191 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.012 away. White text reads best on it, at 6.74:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.191) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.11:1 |
| White text | 6.74:1 |
Values
| HEX | #B6151D |
| RGB | rgb(182, 21, 29) |
| HSL | hsl(357, 79%, 40%) |
| OKLCH | oklch(49.6% 0.191 26.3) |
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 #B6151D | 6.74:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #B6151D | 3.11:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #B6151D text on white | 6.74:1 | AA | Lc 81.2 | Fine for body text |
| #B6151D text on black | 3.11:1 | AA large text | Lc -20.7 | 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
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#FACDC7
oklch(88.6% 0.052 27)
-
Step 300
300
#F7AAA1
oklch(81% 0.092 26.7)
-
Step 400
400
#EF786E
oklch(70.8% 0.148 26.4)
-
Step 500
500
#E54D47
oklch(63% 0.189 26.3)
-
Step 600
600
#D12529
oklch(55.7% 0.206 26.3)
-
Step 700
700 (this color)
#B6151D
oklch(49.6% 0.191 26.3)
-
Step 800
800
#921619
oklch(42.6% 0.158 26.3)
-
Step 900
900
#751D1B
oklch(37.7% 0.122 26.4)
-
Step 950
950
#451311
oklch(27% 0.077 26)
#B6151D 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) | #4E461B | 0.210 |
| Deuteranopia (no green cones) | #746713 | 0.189 |
| Tritanopia (no blue cones) | #C9001B | 0.038 |
| Achromatopsia (no color) | #5B5B5B | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B6151D
#B6151D
oklch(49.6% 0.191 26.3)
- #006F7A
#006F7A
oklch(49.5% 0.085 206.8)
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 #B6151D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.012
- Scarlet #BE0119 ΔE 0.016
- Rufous #AE2012 ΔE 0.020
- Lipstick Red #C0022F ΔE 0.028
- Rust Red #AA2704 ΔE 0.033
- Rusty Red #AF2F0D ΔE 0.034
- Brown #A52A2A ΔE 0.035
- Rose Red #BE013C ΔE 0.040
Use #B6151D 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.