#B13900
Closest named color: Rusty Red (#AF2F0D). oklch(51.5% 0.165 39), rgb(177, 57, 0).
Aa
White text reads best on this color (6.07:1).
About this color
#B13900 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.165 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.020 away. White text reads best on it, at 6.07:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.165) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.45:1 |
| White text | 6.07:1 |
Values
| HEX | #B13900 |
| RGB | rgb(177, 57, 0) |
| HSL | hsl(19, 100%, 35%) |
| OKLCH | oklch(51.5% 0.165 39) |
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 #B13900 | 6.07:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #B13900 | 3.45:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #B13900 text on white | 6.07:1 | AA | Lc 79.2 | Fine for body text |
| #B13900 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
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F4D0C4
oklch(88.5% 0.044 39.3)
-
Step 300
300
#EEAF9B
oklch(80.8% 0.079 38.3)
-
Step 400
400
#E38363
oklch(70.7% 0.127 39.1)
-
Step 500
500
#D95F35
oklch(63.2% 0.164 38.9)
-
Step 600
600
#C44102
oklch(55.6% 0.177 39.2)
-
Step 700
700 (this color)
#B13900
oklch(51.5% 0.165 39)
-
Step 800
800
#892A00
oklch(42.6% 0.137 39)
-
Step 900
900
#6E280E
oklch(37.6% 0.106 39.2)
-
Step 950
950
#41180B
oklch(26.9% 0.068 38)
#B13900 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 | 0.165 |
| Deuteranopia (no green cones) | #7B6C00 | 0.147 |
| Tritanopia (no blue cones) | #C30C31 | 0.071 |
| Achromatopsia (no color) | #626262 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B13900
#B13900
oklch(51.5% 0.165 39)
- #00738C
#00738C
oklch(51.4% 0.093 219.9)
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 #B13900, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.020
- Sinopia #BB3E03 ΔE 0.024
- Russet #A13905 ΔE 0.032
- Rust Red #AA2704 ΔE 0.035
- Burnt Umber #A0450E ΔE 0.036
- Brick #A03623 ΔE 0.041
- Rufous #AE2012 ΔE 0.041
- Cinnamon #AC4F06 ΔE 0.042
Use #B13900 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.