#B7551F
Closest named color: Burnt Siena (#B75203). oklch(56.4% 0.142 45.6), rgb(183, 85, 31).
Aa
White text reads best on this color (4.84:1).
About this color
#B7551F is a medium-dark, vivid orange. In OKLCH its lightness is 56%, its chroma 0.142 and its hue 46°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.012 away. White text reads best on it, at 4.84:1.
| Hue family | Oranges |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.142) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.33:1 |
| White text | 4.84:1 |
Values
| HEX | #B7551F |
| RGB | rgb(183, 85, 31) |
| HSL | hsl(21, 71%, 42%) |
| OKLCH | oklch(56.4% 0.142 45.6) |
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 #B7551F | 4.84:1 | AA | Lc -78.4 | Fine for body text |
| Black text on #B7551F | 4.33:1 | AA large text | Lc 31.1 | Non-text elements, placeholder text |
| #B7551F text on white | 4.84:1 | AA | Lc 73.0 | Content text, not long reading |
| #B7551F text on black | 4.33:1 | AA large text | Lc -28.7 | 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
#F5E6E0
oklch(93.5% 0.018 43.2)
-
Step 200
200
#EED2C6
oklch(88.4% 0.035 44.6)
-
Step 300
300
#E5B49E
oklch(80.9% 0.065 45.4)
-
Step 400
400
#D68C69
oklch(70.8% 0.103 45.9)
-
Step 500
500
#C96D40
oklch(63.1% 0.131 45.5)
-
Step 600
600 (this color)
#B7551F
oklch(56.4% 0.142 45.6)
-
Step 700
700
#9B420C
oklch(49.1% 0.133 45.4)
-
Step 800
800
#7E3710
oklch(42.7% 0.11 45.2)
-
Step 900
900
#663116
oklch(37.8% 0.086 45.6)
-
Step 950
950
#3C1D0E
oklch(27.1% 0.055 45.4)
#B7551F 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) | #716416 | 0.131 |
| Deuteranopia (no green cones) | #897A1C | 0.119 |
| Tritanopia (no blue cones) | #C93F4A | 0.076 |
| Achromatopsia (no color) | #717171 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B7551F
#B7551F
oklch(56.4% 0.142 45.6)
- #0082A5
#0082A5
oklch(56.4% 0.107 225.2)
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 #B7551F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.012
- Burnt Orange #C04E01 ΔE 0.020
- Brick Orange #C14A09 ΔE 0.025
- Rust Orange #C45508 ΔE 0.026
- Cinnamon #AC4F06 ΔE 0.029
- Copper #B66325 ΔE 0.031
- Orangey Brown #B16002 ΔE 0.033
- Raw Umber #A75E09 ΔE 0.039
Use #B7551F 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.