#B64303
Closest named color: Sinopia (#BB3E03). oklch(53.6% 0.161 41.7), rgb(182, 67, 3).
Aa
White text reads best on this color (5.53:1).
About this color
#B64303 is a medium-dark, vivid orange. In OKLCH its lightness is 54%, its chroma 0.161 and its hue 42°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.012 away. White text reads best on it, at 5.53:1.
| Hue family | Oranges |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.161) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.79:1 |
| White text | 5.53:1 |
Values
| HEX | #B64303 |
| RGB | rgb(182, 67, 3) |
| HSL | hsl(21, 97%, 36%) |
| OKLCH | oklch(53.6% 0.161 41.7) |
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 #B64303 | 5.53:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #B64303 | 3.79:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #B64303 text on white | 5.53:1 | AA | Lc 76.7 | Fine for body text |
| #B64303 text on black | 3.79:1 | AA large text | Lc -25.1 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F7E6DF
oklch(93.7% 0.021 43.9)
-
Step 200
200
#F2D1C5
oklch(88.5% 0.041 41)
-
Step 300
300
#EAB29C
oklch(80.9% 0.072 42.4)
-
Step 400
400
#DD8766
oklch(70.7% 0.116 41.6)
-
Step 500
500
#D2663A
oklch(63.2% 0.148 41.7)
-
Step 600
600 (this color)
#B64303
oklch(53.6% 0.161 41.7)
-
Step 700
700
#A23A00
oklch(49% 0.149 41.7)
-
Step 800
800
#843108
oklch(42.7% 0.124 41.7)
-
Step 900
900
#6A2C12
oklch(37.6% 0.096 41.5)
-
Step 950
950
#3F1B0C
oklch(27.1% 0.061 42.2)
#B64303 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) | #655800 | 0.156 |
| Deuteranopia (no green cones) | #817200 | 0.141 |
| Tritanopia (no blue cones) | #C92239 | 0.075 |
| Achromatopsia (no color) | #686868 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B64303
#B64303
oklch(53.6% 0.161 41.7)
- #007A96
#007A96
oklch(53.7% 0.099 221.3)
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 #B64303, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.012
- Brick Orange #C14A09 ΔE 0.028
- Cinnamon #AC4F06 ΔE 0.028
- Burnt Siena #B75203 ΔE 0.031
- Burnt Orange #C04E01 ΔE 0.032
- Rusty Red #AF2F0D ΔE 0.041
- Burnt Umber #A0450E ΔE 0.043
- Sienna #A0522D ΔE 0.047
Use #B64303 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.