#B71525
Closest named color: Firebrick (#B22222). oklch(49.9% 0.191 24.3), rgb(183, 21, 37).
Aa
White text reads best on this color (6.67:1).
About this color
#B71525 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.191 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.014 away. White text reads best on it, at 6.67:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.191) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #B71525 |
| RGB | rgb(183, 21, 37) |
| HSL | hsl(354, 79%, 40%) |
| OKLCH | oklch(49.9% 0.191 24.3) |
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 #B71525 | 6.67:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #B71525 | 3.14:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #B71525 text on white | 6.67:1 | AA | Lc 80.9 | Fine for body text |
| #B71525 text on black | 3.14:1 | AA large text | Lc -21.0 | 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
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FACDC9
oklch(88.6% 0.051 24.1)
-
Step 300
300
#F7A9A3
oklch(80.9% 0.093 24.2)
-
Step 400
400
#EF7772
oklch(70.7% 0.149 24)
-
Step 500
500
#E54D4D
oklch(63.1% 0.188 24.3)
-
Step 600
600
#D12330
oklch(55.6% 0.206 24.2)
-
Step 700
700 (this color)
#B71525
oklch(49.9% 0.191 24.3)
-
Step 800
800
#92151E
oklch(42.6% 0.158 24.4)
-
Step 900
900
#761C1E
oklch(37.8% 0.124 24.3)
-
Step 950
950
#451312
oklch(27% 0.077 24.9)
#B71525 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) | #4E4624 | 0.211 |
| Deuteranopia (no green cones) | #74681E | 0.191 |
| Tritanopia (no blue cones) | #CA001E | 0.038 |
| Achromatopsia (no color) | #5C5C5C | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B71525
#B71525
oklch(49.9% 0.191 24.3)
- #007179
#007179
oklch(50% 0.085 203.4)
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 #B71525, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.014
- Scarlet #BE0119 ΔE 0.016
- Lipstick Red #C0022F ΔE 0.022
- Rufous #AE2012 ΔE 0.026
- Rose Red #BE013C ΔE 0.033
- Rouge #AB1239 ΔE 0.037
- Brown #A52A2A ΔE 0.037
- Rusty Red #AF2F0D ΔE 0.039
Use #B71525 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.