#BF5B00
Closest named color: Rust Orange (#C45508). oklch(58.4% 0.152 51.3), rgb(191, 91, 0).
Aa
Black text reads best on this color (4.71:1).
About this color
#BF5B00 is a medium-dark, vivid orange. In OKLCH its lightness is 58%, its chroma 0.152 and its hue 51°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.016 away. Black text reads best on it, at 4.71:1.
| Hue family | Oranges |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.152) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #BF5B00 |
| RGB | rgb(191, 91, 0) |
| HSL | hsl(29, 100%, 37%) |
| OKLCH | oklch(58.4% 0.152 51.3) |
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 #BF5B00 | 4.45:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #BF5B00 | 4.71:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #BF5B00 text on white | 4.45:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #BF5B00 text on black | 4.71:1 | AA | Lc -31.4 | Non-text elements, placeholder text |
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
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F5E6DE
oklch(93.5% 0.02 50.1)
-
Step 200
200
#EFD3C3
oklch(88.6% 0.038 51.7)
-
Step 300
300
#E5B599
oklch(80.9% 0.068 51.7)
-
Step 400
400
#D78C5F
oklch(70.7% 0.11 51.1)
-
Step 500
500
#CA6D2E
oklch(63.1% 0.139 51.2)
-
Step 600
600 (this color)
#BF5B00
oklch(58.4% 0.152 51.3)
-
Step 700
700
#974700
oklch(49.2% 0.127 51.6)
-
Step 800
800
#7D3900
oklch(42.8% 0.111 51.1)
-
Step 900
900
#663109
oklch(37.7% 0.09 51.6)
-
Step 950
950
#3C1D08
oklch(27% 0.058 51.7)
#BF5B00 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) | #786900 | 0.130 |
| Deuteranopia (no green cones) | #918000 | 0.117 |
| Tritanopia (no blue cones) | #D2434D | 0.091 |
| Achromatopsia (no color) | #777777 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BF5B00
#BF5B00
oklch(58.4% 0.152 51.3)
- #0087B4
#0087B4
oklch(58.4% 0.117 230.8)
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 #BF5B00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.016
- Orange Brown #BE6400 ΔE 0.020
- Copper #B66325 ΔE 0.023
- Rusty Orange #CD5909 ΔE 0.027
- Burnt Siena #B75203 ΔE 0.027
- Orangey Brown #B16002 ΔE 0.027
- Burnt Orange #C04E01 ΔE 0.027
- Umber #B26400 ΔE 0.030
Use #BF5B00 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.