#B8312D
Closest named color: Firebrick (#B22222). oklch(52.2% 0.173 26.9), rgb(184, 49, 45).
Aa
White text reads best on this color (5.97:1).
About this color
#B8312D is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.173 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.026 away. White text reads best on it, at 5.97:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.173) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.51:1 |
| White text | 5.97:1 |
Values
| HEX | #B8312D |
| RGB | rgb(184, 49, 45) |
| HSL | hsl(2, 61%, 45%) |
| OKLCH | oklch(52.2% 0.173 26.9) |
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 #B8312D | 5.97:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #B8312D | 3.51:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #B8312D text on white | 5.97:1 | AA | Lc 78.6 | Fine for body text |
| #B8312D text on black | 3.51:1 | AA large text | Lc -23.2 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4E1
oklch(93.6% 0.025 26.9)
-
Step 200
200
#F7CEC9
oklch(88.5% 0.047 26.2)
-
Step 300
300
#F2ACA4
oklch(80.9% 0.084 26.4)
-
Step 400
400
#E87D73
oklch(70.7% 0.134 26.5)
-
Step 500
500
#DE574E
oklch(63.2% 0.171 26.9)
-
Step 600
600
#C93531
oklch(55.6% 0.186 26.9)
-
Step 700
700 (this color)
#B8312D
oklch(52.2% 0.173 26.9)
-
Step 800
800
#8D221F
oklch(42.7% 0.143 26.9)
-
Step 900
900
#71231F
oklch(37.7% 0.111 26.7)
-
Step 950
950
#431613
oklch(27.1% 0.071 26.6)
#B8312D 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) | #59512B | 0.185 |
| Deuteranopia (no green cones) | #7B6E28 | 0.169 |
| Tritanopia (no blue cones) | #CB0032 | 0.048 |
| Achromatopsia (no color) | #636363 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B8312D
#B8312D
oklch(52.2% 0.173 26.9)
- #007783
#007783
oklch(52% 0.089 207.1)
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 #B8312D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.026
- Dull Red #BB3F3F ΔE 0.027
- Rusty Red #AF2F0D ΔE 0.031
- Scarlet #BE0119 ΔE 0.036
- Rufous #AE2012 ΔE 0.037
- Lipstick Red #C0022F ΔE 0.040
- Sinopia #BB3E03 ΔE 0.040
- Brown #A52A2A ΔE 0.043
Use #B8312D 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.