#B0451A
Closest named color: Sinopia (#BB3E03). oklch(52.9% 0.15 40), rgb(176, 69, 26).
Aa
White text reads best on this color (5.65:1).
About this color
#B0451A is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.150 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.022 away. White text reads best on it, at 5.65:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.150) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #B0451A |
| RGB | rgb(176, 69, 26) |
| HSL | hsl(17, 74%, 40%) |
| OKLCH | oklch(52.9% 0.15 40) |
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 #B0451A | 5.65:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #B0451A | 3.71:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #B0451A text on white | 5.65:1 | AA | Lc 77.5 | Fine for body text |
| #B0451A text on black | 3.71:1 | AA large text | Lc -24.3 | 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 600.
-
Step 50
50
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F6E6E0
oklch(93.6% 0.019 41.8)
-
Step 200
200
#F0D1C7
oklch(88.4% 0.038 38.7)
-
Step 300
300
#E8B3A0
oklch(81% 0.068 40.6)
-
Step 400
400
#DA896C
oklch(70.8% 0.108 40.4)
-
Step 500
500
#CE6944
oklch(63.2% 0.138 40.3)
-
Step 600
600 (this color)
#B0451A
oklch(52.9% 0.15 40)
-
Step 700
700
#9F3D16
oklch(49% 0.14 39.8)
-
Step 800
800
#813316
oklch(42.6% 0.115 39.5)
-
Step 900
900
#682E19
oklch(37.7% 0.09 39.9)
-
Step 950
950
#3D1C10
oklch(27.1% 0.056 40.4)
#B0451A 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) | #645813 | 0.147 |
| Deuteranopia (no green cones) | #7E7015 | 0.134 |
| Tritanopia (no blue cones) | #C22A3D | 0.069 |
| Achromatopsia (no color) | #676767 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B0451A
#B0451A
oklch(52.9% 0.15 40)
- #007892
#007892
oklch(53% 0.096 219.9)
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 #B0451A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.022
- Cinnamon #AC4F06 ΔE 0.026
- Burnt Umber #A0450E ΔE 0.033
- Burnt Siena #B75203 ΔE 0.036
- Sienna #A0522D ΔE 0.036
- Brick Orange #C14A09 ΔE 0.037
- Rusty Red #AF2F0D ΔE 0.038
- Burnt Orange #C04E01 ΔE 0.041
Use #B0451A 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.