#B2313B
Closest named color: Firebrick (#B22222). oklch(51.3% 0.165 21.1), rgb(178, 49, 59).
Aa
White text reads best on this color (6.18:1).
About this color
#B2313B is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.165 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.028 away. White text reads best on it, at 6.18:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.39:1 |
| White text | 6.18:1 |
Values
| HEX | #B2313B |
| RGB | rgb(178, 49, 59) |
| HSL | hsl(355, 57%, 45%) |
| OKLCH | oklch(51.3% 0.165 21.1) |
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 #B2313B | 6.18:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #B2313B | 3.39:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #B2313B text on white | 6.18:1 | AA | Lc 79.7 | Fine for body text |
| #B2313B text on black | 3.39:1 | AA large text | Lc -22.2 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E4E3
oklch(93.5% 0.023 20.9)
-
Step 200
200
#F5CECC
oklch(88.4% 0.044 21.5)
-
Step 300
300
#F0ADAA
oklch(81% 0.079 21.8)
-
Step 400
400
#E57E7D
oklch(70.7% 0.128 21.4)
-
Step 500
500
#DA595D
oklch(63.1% 0.162 21.1)
-
Step 600
600
#C63843
oklch(55.6% 0.178 21.1)
-
Step 700
700 (this color)
#B2313B
oklch(51.3% 0.165 21.1)
-
Step 800
800
#8A242C
oklch(42.6% 0.137 21.1)
-
Step 900
900
#6F2428
oklch(37.6% 0.106 20.8)
-
Step 950
950
#421618
oklch(27% 0.068 20.2)
#B2313B 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) | #55503A | 0.180 |
| Deuteranopia (no green cones) | #766B37 | 0.165 |
| Tritanopia (no blue cones) | #C30036 | 0.044 |
| Achromatopsia (no color) | #616161 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B2313B
#B2313B
oklch(51.3% 0.165 21.1)
- #00767C
#00767C
oklch(51.5% 0.088 201)
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 #B2313B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.028
- Dull Red #BB3F3F ΔE 0.033
- Brown #A52A2A ΔE 0.035
- Lipstick Red #C0022F ΔE 0.040
- Rufous #AE2012 ΔE 0.041
- Rusty Red #AF2F0D ΔE 0.041
- Rose Red #BE013C ΔE 0.042
- Rouge #AB1239 ΔE 0.043
Use #B2313B 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.