#B10016
Closest named color: Rufous (#AE2012). oklch(47.9% 0.195 26), rgb(177, 0, 22).
Aa
White text reads best on this color (7.28:1).
About this color
#B10016 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.195 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.022 away. White text reads best on it, at 7.28:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.195) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.88:1 |
| White text | 7.28:1 |
Values
| HEX | #B10016 |
| RGB | rgb(177, 0, 22) |
| HSL | hsl(353, 100%, 35%) |
| OKLCH | oklch(47.9% 0.195 26) |
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 #B10016 | 7.28:1 | AAA | Lc -87.7 | Fine for body text |
| Black text on #B10016 | 2.88:1 | Fails | Lc 21.4 | Dividers and decoration only |
| #B10016 text on white | 7.28:1 | AAA | Lc 82.6 | Fine for body text |
| #B10016 text on black | 2.88:1 | Fails | Lc -19.3 | 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
#FCE3E0
oklch(93.5% 0.028 25.9)
-
Step 200
200
#FACDC7
oklch(88.6% 0.052 27)
-
Step 300
300
#F8A9A1
oklch(80.9% 0.095 25.8)
-
Step 400
400
#F0776E
oklch(70.7% 0.151 25.9)
-
Step 500
500
#E74B47
oklch(63.1% 0.193 25.8)
-
Step 600
600
#D22128
oklch(55.6% 0.209 26)
-
Step 700
700 (this color)
#B10016
oklch(47.9% 0.195 26)
-
Step 800
800
#931318
oklch(42.6% 0.161 26.1)
-
Step 900
900
#761B1A
oklch(37.6% 0.126 26.1)
-
Step 950
950
#461210
oklch(27% 0.08 26.2)
#B10016 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) | #484013 | 0.216 |
| Deuteranopia (no green cones) | #6F6308 | 0.195 |
| Tritanopia (no blue cones) | #C4000E | 0.041 |
| Achromatopsia (no color) | #565656 | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B10016
#B10016
oklch(47.9% 0.195 26)
- #006A74
#006A74
oklch(47.9% 0.082 206.2)
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 #B10016, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.022
- Firebrick #B22222 ΔE 0.024
- Scarlet #BE0119 ΔE 0.028
- Rust Red #AA2704 ΔE 0.034
- Brown #A52A2A ΔE 0.035
- Rouge #AB1239 ΔE 0.037
- Lipstick Red #C0022F ΔE 0.039
- Burnt Red #9F2305 ΔE 0.043
Use #B10016 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.