#BB1821
Closest named color: Scarlet (#BE0119). oklch(50.7% 0.194 25.9), rgb(187, 24, 33).
Aa
White text reads best on this color (6.43:1).
About this color
#BB1821 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.194 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.011 away. White text reads best on it, at 6.43:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.194) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #BB1821 |
| RGB | rgb(187, 24, 33) |
| HSL | hsl(357, 77%, 41%) |
| OKLCH | oklch(50.7% 0.194 25.9) |
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 #BB1821 | 6.43:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #BB1821 | 3.26:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #BB1821 text on white | 6.43:1 | AA | Lc 79.9 | Fine for body text |
| #BB1821 text on black | 3.26:1 | AA large text | Lc -21.9 | 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 700.
-
Step 50
50
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E0
oklch(93.5% 0.028 25.9)
-
Step 200
200
#FACDC7
oklch(88.6% 0.052 27)
-
Step 300
300
#F7A9A1
oklch(80.8% 0.093 25.8)
-
Step 400
400
#F0776E
oklch(70.7% 0.151 25.9)
-
Step 500
500
#E64C48
oklch(63.1% 0.191 25.8)
-
Step 600
600
#D22129
oklch(55.6% 0.209 25.8)
-
Step 700
700 (this color)
#BB1821
oklch(50.7% 0.194 25.9)
-
Step 800
800
#931419
oklch(42.7% 0.16 26)
-
Step 900
900
#761B1B
oklch(37.6% 0.125 25.6)
-
Step 950
950
#461211
oklch(27% 0.08 25.2)
#BB1821 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) | #51481F | 0.212 |
| Deuteranopia (no green cones) | #786B18 | 0.193 |
| Tritanopia (no blue cones) | #CE001E | 0.037 |
| Achromatopsia (no color) | #5F5F5F | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB1821
#BB1821
oklch(50.7% 0.194 25.9)
- #00737E
#00737E
oklch(50.7% 0.087 206.4)
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 #BB1821, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.011
- Firebrick #B22222 ΔE 0.018
- Lipstick Red #C0022F ΔE 0.022
- Rufous #AE2012 ΔE 0.029
- Rose Red #BE013C ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.037
- Rust Red #AA2704 ΔE 0.041
- Brown #A52A2A ΔE 0.044
Use #BB1821 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.