#B53806
Closest named color: Sinopia (#BB3E03). oklch(52.1% 0.169 37.5), rgb(181, 56, 6).
Aa
White text reads best on this color (5.94:1).
About this color
#B53806 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.169 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.018 away. White text reads best on it, at 5.94:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.169) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #B53806 |
| RGB | rgb(181, 56, 6) |
| HSL | hsl(17, 94%, 37%) |
| OKLCH | oklch(52.1% 0.169 37.5) |
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 #B53806 | 5.94:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #B53806 | 3.53:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #B53806 text on white | 5.94:1 | AA | Lc 78.5 | Fine for body text |
| #B53806 text on black | 3.53:1 | AA large text | Lc -23.3 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F5D0C4
oklch(88.6% 0.045 38.8)
-
Step 300
300
#F0AF9B
oklch(81% 0.082 37.8)
-
Step 400
400
#E58163
oklch(70.6% 0.131 37.5)
-
Step 500
500
#DB5D36
oklch(63.2% 0.167 37.5)
-
Step 600
600
#C63D05
oklch(55.5% 0.182 37.4)
-
Step 700
700 (this color)
#B53806
oklch(52.1% 0.169 37.5)
-
Step 800
800
#8B2802
oklch(42.8% 0.14 37.4)
-
Step 900
900
#6F270F
oklch(37.7% 0.108 37.9)
-
Step 950
950
#42180B
oklch(27.1% 0.069 37.6)
#B53806 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) | #5E5200 | 0.171 |
| Deuteranopia (no green cones) | #7D6E00 | 0.154 |
| Tritanopia (no blue cones) | #C80330 | 0.069 |
| Achromatopsia (no color) | #646464 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B53806
#B53806
oklch(52.1% 0.169 37.5)
- #00768C
#00768C
oklch(52.2% 0.093 216.8)
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 #B53806, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.018
- Rusty Red #AF2F0D ΔE 0.022
- Rust Red #AA2704 ΔE 0.038
- Russet #A13905 ΔE 0.040
- Firebrick #B22222 ΔE 0.042
- Rufous #AE2012 ΔE 0.042
- Burnt Umber #A0450E ΔE 0.044
- Brick Orange #C14A09 ΔE 0.044
Use #B53806 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.