#B5271F
Closest named color: Firebrick (#B22222). oklch(50.6% 0.179 28.7), rgb(181, 39, 31).
Aa
White text reads best on this color (6.41:1).
About this color
#B5271F is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.179 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.011 away. White text reads best on it, at 6.41:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.179) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #B5271F |
| RGB | rgb(181, 39, 31) |
| HSL | hsl(3, 71%, 42%) |
| OKLCH | oklch(50.6% 0.179 28.7) |
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 #B5271F | 6.41:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #B5271F | 3.27:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #B5271F text on white | 6.41:1 | AA | Lc 80.3 | Fine for body text |
| #B5271F text on black | 3.27:1 | AA large text | Lc -21.5 | 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
#FAE4E0
oklch(93.6% 0.025 29.9)
-
Step 200
200
#F8CEC7
oklch(88.6% 0.049 29.1)
-
Step 300
300
#F4ACA1
oklch(81% 0.087 28.8)
-
Step 400
400
#EA7C6E
oklch(70.7% 0.138 28.6)
-
Step 500
500
#E05447
oklch(63% 0.177 28.4)
-
Step 600
600
#CC3127
oklch(55.6% 0.193 28.8)
-
Step 700
700 (this color)
#B5271F
oklch(50.6% 0.179 28.7)
-
Step 800
800
#8F1F18
oklch(42.8% 0.149 28.7)
-
Step 900
900
#73211A
oklch(37.7% 0.116 28.7)
-
Step 950
950
#441510
oklch(27.1% 0.074 28.9)
#B5271F 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) | #544B1C | 0.193 |
| Deuteranopia (no green cones) | #776A17 | 0.176 |
| Tritanopia (no blue cones) | #C80027 | 0.042 |
| Achromatopsia (no color) | #5F5F5F | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B5271F
#B5271F
oklch(50.6% 0.179 28.7)
- #00727F
#00727F
oklch(50.5% 0.087 208.6)
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 #B5271F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.011
- Rufous #AE2012 ΔE 0.020
- Rusty Red #AF2F0D ΔE 0.021
- Scarlet #BE0119 ΔE 0.027
- Rust Red #AA2704 ΔE 0.028
- Brown #A52A2A ΔE 0.033
- Lipstick Red #C0022F ΔE 0.037
- Brick #A03623 ΔE 0.043
Use #B5271F 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.