#BB3E03
Named color: Sinopia. oklch(53.8% 0.17 39.2), rgb(187, 62, 3).
Aa
White text reads best on this color (5.52:1).
About this color
#BB3E03 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.170 and its hue 39°. Its hue sits on the warm side of the wheel. It is the named color Sinopia. White text reads best on it, at 5.52:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Sinopia |
| Black text | 3.80:1 |
| White text | 5.52:1 |
Values
| HEX | #BB3E03 |
| RGB | rgb(187, 62, 3) |
| HSL | hsl(19, 97%, 37%) |
| OKLCH | oklch(53.8% 0.17 39.2) |
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 #BB3E03 | 5.52:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #BB3E03 | 3.80:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #BB3E03 text on white | 5.52:1 | AA | Lc 76.4 | Fine for body text |
| #BB3E03 text on black | 3.80:1 | AA large text | Lc -25.3 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F8E5DF
oklch(93.5% 0.022 38.3)
-
Step 200
200
#F3D0C5
oklch(88.4% 0.042 38.2)
-
Step 300
300
#EDB09C
oklch(80.9% 0.077 38.9)
-
Step 400
400
#E18465
oklch(70.6% 0.123 39.1)
-
Step 500
500
#D66239
oklch(63.2% 0.157 39.4)
-
Step 600
600 (this color)
#BB3E03
oklch(53.8% 0.17 39.2)
-
Step 700
700
#A63500
oklch(49.1% 0.157 39.1)
-
Step 800
800
#872D07
oklch(42.7% 0.131 39.2)
-
Step 900
900
#6D2A11
oklch(37.8% 0.102 39.6)
-
Step 950
950
#40190C
oklch(26.9% 0.065 38.7)
#BB3E03 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) | #645700 | 0.169 |
| Deuteranopia (no green cones) | #827300 | 0.153 |
| Tritanopia (no blue cones) | #CE1235 | 0.073 |
| Achromatopsia (no color) | #696969 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB3E03
#BB3E03
oklch(53.8% 0.17 39.2)
- #007B94
#007B94
oklch(53.8% 0.097 218.6)
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 #BB3E03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick Orange #C14A09 ΔE 0.027
- Burnt Orange #C04E01 ΔE 0.034
- Burnt Siena #B75203 ΔE 0.038
- Rusty Red #AF2F0D ΔE 0.039
- Cinnamon #AC4F06 ΔE 0.040
- Dull Red #BB3F3F ΔE 0.045
- Rust Orange #C45508 ΔE 0.051
- Burnt Umber #A0450E ΔE 0.052
Use #BB3E03 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.