#BB0121
Closest named color: Scarlet (#BE0119). oklch(50% 0.202 24.1), rgb(187, 1, 33).
Aa
White text reads best on this color (6.68:1).
About this color
#BB0121 is a medium-dark, vivid red. In OKLCH its lightness is 50%, its chroma 0.202 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Scarlet (#BE0119), ΔE 0.009 away. White text reads best on it, at 6.68:1.
| Hue family | Reds |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.202) |
| Temperature | warm |
| Nearest name | Scarlet (#BE0119) |
| Black text | 3.13:1 |
| White text | 6.68:1 |
Values
| HEX | #BB0121 |
| RGB | rgb(187, 1, 33) |
| HSL | hsl(350, 99%, 37%) |
| OKLCH | oklch(50% 0.202 24.1) |
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 #BB0121 | 6.68:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #BB0121 | 3.13:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #BB0121 text on white | 6.68:1 | AA | Lc 80.3 | Fine for body text |
| #BB0121 text on black | 3.13:1 | AA large text | Lc -21.5 | 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
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FBCCC8
oklch(88.5% 0.054 23.9)
-
Step 300
300
#FAA8A2
oklch(81% 0.098 24.1)
-
Step 400
400
#F2746F
oklch(70.6% 0.156 24.2)
-
Step 500
500
#EA4749
oklch(63.2% 0.2 24.3)
-
Step 600
600
#D5142B
oklch(55.6% 0.217 24.2)
-
Step 700
700 (this color)
#BB0121
oklch(50% 0.202 24.1)
-
Step 800
800
#950A1B
oklch(42.6% 0.167 24.1)
-
Step 900
900
#78181C
oklch(37.7% 0.13 24.2)
-
Step 950
950
#471111
oklch(27.1% 0.082 24.5)
#BB0121 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) | #4C441F | 0.224 |
| Deuteranopia (no green cones) | #756918 | 0.203 |
| Tritanopia (no blue cones) | #CF0014 | 0.043 |
| Achromatopsia (no color) | #5C5C5C | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB0121
#BB0121
oklch(50% 0.202 24.1)
- #007179
#007179
oklch(50% 0.085 203.4)
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 #BB0121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Scarlet #BE0119 ΔE 0.009
- Lipstick Red #C0022F ΔE 0.017
- Firebrick #B22222 ΔE 0.024
- Rose Red #BE013C ΔE 0.030
- Rufous #AE2012 ΔE 0.033
- Rouge #AB1239 ΔE 0.041
- Cherry #CF0234 ΔE 0.046
- Brown #A52A2A ΔE 0.046
Use #BB0121 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.