#B63013
Closest named color: Rusty Red (#AF2F0D). oklch(51.5% 0.175 33.4), rgb(182, 48, 19).
Aa
White text reads best on this color (6.13:1).
About this color
#B63013 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.175 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.015 away. White text reads best on it, at 6.13:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.42:1 |
| White text | 6.13:1 |
Values
| HEX | #B63013 |
| RGB | rgb(182, 48, 19) |
| HSL | hsl(11, 81%, 39%) |
| OKLCH | oklch(51.5% 0.175 33.4) |
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 #B63013 | 6.13:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #B63013 | 3.42:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #B63013 text on white | 6.13:1 | AA | Lc 79.3 | Fine for body text |
| #B63013 text on black | 3.42:1 | AA large text | Lc -22.5 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FAE4DF
oklch(93.5% 0.025 32.9)
-
Step 200
200
#F7CFC5
oklch(88.6% 0.047 34.3)
-
Step 300
300
#F2AD9D
oklch(80.9% 0.085 33.5)
-
Step 400
400
#E87E67
oklch(70.6% 0.136 33.3)
-
Step 500
500
#DE583D
oklch(63.1% 0.173 33.2)
-
Step 600
600
#CA3717
oklch(55.7% 0.189 33.4)
-
Step 700
700 (this color)
#B63013
oklch(51.5% 0.175 33.4)
-
Step 800
800
#8D230C
oklch(42.7% 0.145 33.4)
-
Step 900
900
#712414
oklch(37.7% 0.112 33.5)
-
Step 950
950
#43160D
oklch(27% 0.072 33.1)
#B63013 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) | #594F0C | 0.185 |
| Deuteranopia (no green cones) | #7A6C07 | 0.166 |
| Tritanopia (no blue cones) | #C9002B | 0.054 |
| Achromatopsia (no color) | #626262 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B63013
#B63013
oklch(51.5% 0.175 33.4)
- #007486
#007486
oklch(51.4% 0.09 213.3)
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 #B63013, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.015
- Firebrick #B22222 ΔE 0.027
- Sinopia #BB3E03 ΔE 0.029
- Rufous #AE2012 ΔE 0.030
- Rust Red #AA2704 ΔE 0.031
- Scarlet #BE0119 ΔE 0.040
- Dull Red #BB3F3F ΔE 0.043
- Brick #A03623 ΔE 0.043
Use #B63013 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.