#B13D31
Closest named color: Dull Red (#BB3F3F). oklch(52.3% 0.153 29.2), rgb(177, 61, 49).
Aa
White text reads best on this color (5.86:1).
About this color
#B13D31 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.153 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.026 away. White text reads best on it, at 5.86:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.153) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.58:1 |
| White text | 5.86:1 |
Values
| HEX | #B13D31 |
| RGB | rgb(177, 61, 49) |
| HSL | hsl(6, 57%, 44%) |
| OKLCH | oklch(52.3% 0.153 29.2) |
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 #B13D31 | 5.86:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #B13D31 | 3.58:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #B13D31 text on white | 5.86:1 | AA | Lc 78.4 | Fine for body text |
| #B13D31 text on black | 3.58:1 | AA large text | Lc -23.4 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F8E5E2
oklch(93.6% 0.021 28.3)
-
Step 200
200
#F3D0CA
oklch(88.6% 0.04 29.4)
-
Step 300
300
#EDAFA5
oklch(80.9% 0.075 29.1)
-
Step 400
400
#E18375
oklch(70.8% 0.118 29.4)
-
Step 500
500
#D56051
oklch(63.1% 0.151 29.4)
-
Step 600
600
#C14235
oklch(55.6% 0.165 29.2)
-
Step 700
700 (this color)
#B13D31
oklch(52.3% 0.153 29.2)
-
Step 800
800
#872B22
oklch(42.7% 0.127 29)
-
Step 900
900
#6D2921
oklch(37.8% 0.099 29.2)
-
Step 950
950
#401914
oklch(27.1% 0.062 29.2)
#B13D31 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) | #5D552F | 0.161 |
| Deuteranopia (no green cones) | #7A6E2D | 0.148 |
| Tritanopia (no blue cones) | #C31F3B | 0.052 |
| Achromatopsia (no color) | #656565 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B13D31
#B13D31
oklch(52.3% 0.153 29.2)
- #007886
#007886
oklch(52.4% 0.09 209)
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 #B13D31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.026
- Rusty Red #AF2F0D ΔE 0.031
- Sinopia #BB3E03 ΔE 0.036
- Firebrick #B22222 ΔE 0.038
- Dusty Red #B9484E ΔE 0.040
- Brick #A03623 ΔE 0.041
- Brown #A52A2A ΔE 0.044
- Rufous #AE2012 ΔE 0.045
Use #B13D31 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.