#B1040D
Closest named color: Rufous (#AE2012). oklch(47.9% 0.194 27.9), rgb(177, 4, 13).
Aa
White text reads best on this color (7.25:1).
About this color
#B1040D is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.194 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.018 away. White text reads best on it, at 7.25:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.194) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #B1040D |
| RGB | rgb(177, 4, 13) |
| HSL | hsl(357, 96%, 35%) |
| OKLCH | oklch(47.9% 0.194 27.9) |
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 #B1040D | 7.25:1 | AAA | Lc -87.7 | Fine for body text |
| Black text on #B1040D | 2.89:1 | Fails | Lc 21.4 | Dividers and decoration only |
| #B1040D text on white | 7.25:1 | AAA | Lc 82.7 | Fine for body text |
| #B1040D text on black | 2.89:1 | 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
#FCE4E0
oklch(93.7% 0.027 28.9)
-
Step 200
200
#FACDC6
oklch(88.5% 0.052 28.5)
-
Step 300
300
#F7AA9F
oklch(80.9% 0.093 28.3)
-
Step 400
400
#F0786A
oklch(70.8% 0.15 28.3)
-
Step 500
500
#E64D42
oklch(63.1% 0.191 27.9)
-
Step 600
600
#D22320
oklch(55.7% 0.209 28)
-
Step 700
700 (this color)
#B1040D
oklch(47.9% 0.194 27.9)
-
Step 800
800
#931513
oklch(42.7% 0.16 28)
-
Step 900
900
#761C17
oklch(37.7% 0.125 28)
-
Step 950
950
#46130F
oklch(27.1% 0.079 28)
#B1040D 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) | #494008 | 0.214 |
| Deuteranopia (no green cones) | #706300 | 0.191 |
| Tritanopia (no blue cones) | #C4000D | 0.040 |
| Achromatopsia (no color) | #575757 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1040D
#B1040D
oklch(47.9% 0.194 27.9)
- #006A75
#006A75
oklch(47.9% 0.082 207.3)
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 #B1040D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.018
- Firebrick #B22222 ΔE 0.023
- Scarlet #BE0119 ΔE 0.029
- Rust Red #AA2704 ΔE 0.030
- Brown #A52A2A ΔE 0.035
- Rusty Red #AF2F0D ΔE 0.039
- Burnt Red #9F2305 ΔE 0.040
- Rouge #AB1239 ΔE 0.042
Use #B1040D 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.