#BB551F
Closest named color: Burnt Siena (#B75203). oklch(57% 0.147 44.8), rgb(187, 85, 31).
Aa
White text reads best on this color (4.73:1).
About this color
#BB551F is a medium-dark, vivid orange. In OKLCH its lightness is 57%, its chroma 0.147 and its hue 45°. Its hue sits on the warm side of the wheel. The nearest named color is Burnt Siena (#B75203), ΔE 0.015 away. White text reads best on it, at 4.73:1.
| Hue family | Oranges |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.147) |
| Temperature | warm |
| Nearest name | Burnt Siena (#B75203) |
| Black text | 4.43:1 |
| White text | 4.73:1 |
Values
| HEX | #BB551F |
| RGB | rgb(187, 85, 31) |
| HSL | hsl(21, 72%, 43%) |
| OKLCH | oklch(57% 0.147 44.8) |
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 #BB551F | 4.73:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #BB551F | 4.43:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #BB551F text on white | 4.73:1 | AA | Lc 72.2 | Content text, not long reading |
| #BB551F text on black | 4.43:1 | AA large text | Lc -29.4 | 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
#EFD2C6
oklch(88.5% 0.037 43.8)
-
Step 300
300
#E6B49E
oklch(80.9% 0.066 44.9)
-
Step 400
400
#D78B68
oklch(70.7% 0.105 45.3)
-
Step 500
500
#CB6B3E
oklch(63.1% 0.135 44.5)
-
Step 600
600 (this color)
#BB551F
oklch(57% 0.147 44.8)
-
Step 700
700
#9D4109
oklch(49.2% 0.136 44.9)
-
Step 800
800
#7F360E
oklch(42.7% 0.113 44.8)
-
Step 900
900
#673015
oklch(37.8% 0.088 44.7)
-
Step 950
950
#3C1C0E
oklch(26.9% 0.055 43.5)
#BB551F 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) | #726516 | 0.137 |
| Deuteranopia (no green cones) | #8B7C1C | 0.124 |
| Tritanopia (no blue cones) | #CE3E4A | 0.077 |
| Achromatopsia (no color) | #737373 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB551F
#BB551F
oklch(57% 0.147 44.8)
- #0084A7
#0084A7
oklch(57% 0.108 224.9)
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 #BB551F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burnt Siena #B75203 ΔE 0.015
- Burnt Orange #C04E01 ΔE 0.016
- Rust Orange #C45508 ΔE 0.019
- Brick Orange #C14A09 ΔE 0.022
- Copper #B66325 ΔE 0.031
- Cinnamon #AC4F06 ΔE 0.035
- Orangey Brown #B16002 ΔE 0.036
- Rusty Orange #CD5909 ΔE 0.038
Use #BB551F 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.