#B1390B
Closest named color: Rusty Red (#AF2F0D). oklch(51.5% 0.164 37.7), rgb(177, 57, 11).
Aa
White text reads best on this color (6.07:1).
About this color
#B1390B is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.164 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.018 away. White text reads best on it, at 6.07:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.164) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.45:1 |
| White text | 6.07:1 |
Values
| HEX | #B1390B |
| RGB | rgb(177, 57, 11) |
| HSL | hsl(17, 88%, 37%) |
| OKLCH | oklch(51.5% 0.164 37.7) |
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 #B1390B | 6.07:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #B1390B | 3.45:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #B1390B text on white | 6.07:1 | AA | Lc 79.2 | Fine for body text |
| #B1390B text on black | 3.45:1 | AA large text | Lc -22.6 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DF
oklch(93.5% 0.022 38.3)
-
Step 200
200
#F4D0C5
oklch(88.5% 0.043 37.7)
-
Step 300
300
#EEAF9C
oklch(80.8% 0.079 37.5)
-
Step 400
400
#E38365
oklch(70.7% 0.126 38.1)
-
Step 500
500
#D85F39
oklch(63.1% 0.161 37.8)
-
Step 600
600
#C4400F
oklch(55.6% 0.176 37.5)
-
Step 700
700 (this color)
#B1390B
oklch(51.5% 0.164 37.7)
-
Step 800
800
#892A06
oklch(42.7% 0.136 37.7)
-
Step 900
900
#6E2811
oklch(37.7% 0.105 37.9)
-
Step 950
950
#41180C
oklch(26.9% 0.067 37)
#B1390B 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) | #5D5100 | 0.166 |
| Deuteranopia (no green cones) | #7A6C00 | 0.150 |
| Tritanopia (no blue cones) | #C30D32 | 0.068 |
| Achromatopsia (no color) | #626262 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1390B
#B1390B
oklch(51.5% 0.164 37.7)
- #00748A
#00748A
oklch(51.5% 0.092 217.1)
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 #B1390B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.018
- Sinopia #BB3E03 ΔE 0.024
- Russet #A13905 ΔE 0.033
- Rust Red #AA2704 ΔE 0.034
- Burnt Umber #A0450E ΔE 0.037
- Brick #A03623 ΔE 0.039
- Rufous #AE2012 ΔE 0.040
- Firebrick #B22222 ΔE 0.041
Use #B1390B 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.