#B40410
Closest named color: Rufous (#AE2012). oklch(48.5% 0.196 27.5), rgb(180, 4, 16).
Aa
White text reads best on this color (7.08:1).
About this color
#B40410 is a medium-dark, vivid red. In OKLCH its lightness is 49%, its chroma 0.196 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.019 away. White text reads best on it, at 7.08:1.
| Hue family | Reds |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.196) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.96:1 |
| White text | 7.08:1 |
Values
| HEX | #B40410 |
| RGB | rgb(180, 4, 16) |
| HSL | hsl(356, 96%, 36%) |
| OKLCH | oklch(48.5% 0.196 27.5) |
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 #B40410 | 7.08:1 | AAA | Lc -87.1 | Fine for body text |
| Black text on #B40410 | 2.96:1 | Fails | Lc 22.1 | Dividers and decoration only |
| #B40410 text on white | 7.08:1 | AAA | Lc 82.0 | Fine for body text |
| #B40410 text on black | 2.96:1 | Fails | Lc -19.9 | 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
#FACDC6
oklch(88.5% 0.052 28.5)
-
Step 300
300
#F8A99F
oklch(80.9% 0.095 27.3)
-
Step 400
400
#F0776B
oklch(70.7% 0.151 27.3)
-
Step 500
500
#E74B42
oklch(63% 0.194 27.4)
-
Step 600
600
#D32020
oklch(55.7% 0.211 27.6)
-
Step 700
700 (this color)
#B40410
oklch(48.5% 0.196 27.5)
-
Step 800
800
#941213
oklch(42.7% 0.163 27.5)
-
Step 900
900
#771B17
oklch(37.8% 0.127 27.6)
-
Step 950
950
#46120F
oklch(27% 0.08 27.1)
#B40410 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) | #4B420C | 0.216 |
| Deuteranopia (no green cones) | #726500 | 0.195 |
| Tritanopia (no blue cones) | #C7000E | 0.040 |
| Achromatopsia (no color) | #585858 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B40410
#B40410
oklch(48.5% 0.196 27.5)
- #006C77
#006C77
oklch(48.6% 0.083 207.1)
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 #B40410, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.019
- Firebrick #B22222 ΔE 0.020
- Scarlet #BE0119 ΔE 0.022
- Rust Red #AA2704 ΔE 0.032
- Lipstick Red #C0022F ΔE 0.036
- Brown #A52A2A ΔE 0.037
- Rusty Red #AF2F0D ΔE 0.038
- Rouge #AB1239 ΔE 0.042
Use #B40410 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.