#B1313F
Closest named color: Firebrick (#B22222). oklch(51.2% 0.164 19.2), rgb(177, 49, 63).
Aa
White text reads best on this color (6.21:1).
About this color
#B1313F is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.164 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.032 away. White text reads best on it, at 6.21:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 3.38:1 |
| White text | 6.21:1 |
Values
| HEX | #B1313F |
| RGB | rgb(177, 49, 63) |
| HSL | hsl(353, 57%, 44%) |
| OKLCH | oklch(51.2% 0.164 19.2) |
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 #B1313F | 6.21:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #B1313F | 3.38:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #B1313F text on white | 6.21:1 | AA | Lc 79.8 | Fine for body text |
| #B1313F text on black | 3.38:1 | AA large text | Lc -22.0 | 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
#FDF3F3
oklch(97.2% 0.011 17.3)
-
Step 100
100
#F9E4E4
oklch(93.6% 0.023 17.6)
-
Step 200
200
#F5CECE
oklch(88.5% 0.044 18)
-
Step 300
300
#F0ACAC
oklch(80.9% 0.08 19)
-
Step 400
400
#E57E81
oklch(70.8% 0.127 19)
-
Step 500
500
#DA5961
oklch(63.2% 0.162 19.3)
-
Step 600
600
#C53948
oklch(55.6% 0.176 19.2)
-
Step 700
700 (this color)
#B1313F
oklch(51.2% 0.164 19.2)
-
Step 800
800
#8A2530
oklch(42.8% 0.135 19.1)
-
Step 900
900
#6F242A
oklch(37.7% 0.106 19.2)
-
Step 950
950
#411619
oklch(26.9% 0.067 18.6)
#B1313F 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) | #54503F | 0.180 |
| Deuteranopia (no green cones) | #756B3B | 0.165 |
| Tritanopia (no blue cones) | #C20537 | 0.042 |
| Achromatopsia (no color) | #616161 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1313F
#B1313F
oklch(51.2% 0.164 19.2)
- #00757A
#00757A
oklch(51.1% 0.087 200)
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 #B1313F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.032
- Dull Red #BB3F3F ΔE 0.035
- Brown #A52A2A ΔE 0.036
- Rouge #AB1239 ΔE 0.041
- Rose Red #BE013C ΔE 0.041
- Lipstick Red #C0022F ΔE 0.041
- Light Burgundy #A8415B ΔE 0.042
- Rufous #AE2012 ΔE 0.044
Use #B1313F 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.