#B7001C
Closest named color: Scarlet (#BE0119). oklch(49.1% 0.199 25), rgb(183, 0, 28).
Aa
White text reads best on this color (6.93:1).
About this color
#B7001C is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.199 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.015 away. White text reads best on it, at 6.93:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.199) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.03:1 |
| White text | 6.93:1 |
Values
| HEX | #B7001C |
| RGB | rgb(183, 0, 28) |
| HSL | hsl(351, 100%, 36%) |
| OKLCH | oklch(49.1% 0.199 25) |
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 #B7001C | 6.93:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #B7001C | 3.03:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #B7001C text on white | 6.93:1 | AA | Lc 81.3 | Fine for body text |
| #B7001C text on black | 3.03:1 | AA large text | Lc -20.6 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FBCCC7
oklch(88.5% 0.054 25.3)
-
Step 300
300
#F9A8A1
oklch(80.9% 0.097 24.9)
-
Step 400
400
#F1756E
oklch(70.6% 0.154 25.1)
-
Step 500
500
#E84948
oklch(63.1% 0.196 25)
-
Step 600
600
#D41A29
oklch(55.6% 0.214 25.1)
-
Step 700
700 (this color)
#B7001C
oklch(49.1% 0.199 25)
-
Step 800
800
#950E1A
oklch(42.8% 0.165 24.9)
-
Step 900
900
#77191B
oklch(37.6% 0.128 25)
-
Step 950
950
#461111
oklch(26.9% 0.081 24.4)
#B7001C 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) | #4B431A | 0.220 |
| Deuteranopia (no green cones) | #736611 | 0.199 |
| Tritanopia (no blue cones) | #CA0011 | 0.041 |
| Achromatopsia (no color) | #5A5A5A | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B7001C
#B7001C
oklch(49.1% 0.199 25)
- #006E77
#006E77
oklch(49.1% 0.084 204.7)
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 #B7001C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.015
- Firebrick #B22222 ΔE 0.021
- Lipstick Red #C0022F ΔE 0.026
- Rufous #AE2012 ΔE 0.027
- Rose Red #BE013C ΔE 0.037
- Rouge #AB1239 ΔE 0.038
- Rust Red #AA2704 ΔE 0.040
- Brown #A52A2A ΔE 0.041
Use #B7001C 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.