#B13F3B
Closest named color: Dull Red (#BB3F3F). oklch(52.7% 0.15 25.6), rgb(177, 63, 59).
Aa
White text reads best on this color (5.76:1).
About this color
#B13F3B is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.150 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.020 away. White text reads best on it, at 5.76:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.150) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.64:1 |
| White text | 5.76:1 |
Values
| HEX | #B13F3B |
| RGB | rgb(177, 63, 59) |
| HSL | hsl(2, 50%, 46%) |
| OKLCH | oklch(52.7% 0.15 25.6) |
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 #B13F3B | 5.76:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #B13F3B | 3.64:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #B13F3B text on white | 5.76:1 | AA | Lc 78.0 | Fine for body text |
| #B13F3B text on black | 3.64:1 | AA large text | Lc -23.8 | 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 600.
-
Step 50
50
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F7E5E3
oklch(93.6% 0.02 25.2)
-
Step 200
200
#F1D0CD
oklch(88.5% 0.037 24)
-
Step 300
300
#E9B0AA
oklch(80.8% 0.068 25.5)
-
Step 400
400
#DC857E
oklch(70.7% 0.108 25.1)
-
Step 500
500
#D0645D
oklch(63.2% 0.138 25.5)
-
Step 600
600 (this color)
#B13F3B
oklch(52.7% 0.15 25.6)
-
Step 700
700
#A13935
oklch(49.2% 0.139 25.8)
-
Step 800
800
#83302C
oklch(42.8% 0.115 25.9)
-
Step 900
900
#692B28
oklch(37.6% 0.09 25.1)
-
Step 950
950
#3E1A18
oklch(27% 0.057 24.8)
#B13F3B 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) | #5D563A | 0.160 |
| Deuteranopia (no green cones) | #7A6F38 | 0.147 |
| Tritanopia (no blue cones) | #C2253F | 0.046 |
| Achromatopsia (no color) | #666666 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B13F3B
#B13F3B
oklch(52.7% 0.15 25.6)
- #007984
#007984
oklch(52.6% 0.09 205.9)
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 #B13F3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.020
- Dusty Red #B9484E ΔE 0.031
- Rusty Red #AF2F0D ΔE 0.041
- Firebrick #B22222 ΔE 0.043
- Light Maroon #A24857 ΔE 0.044
- Sinopia #BB3E03 ΔE 0.044
- Dark Rose #B5485D ΔE 0.045
- Brick #A03623 ΔE 0.047
Use #B13F3B 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.