#B30019
Closest named color: Firebrick (#B22222). oklch(48.3% 0.196 25.5), rgb(179, 0, 25).
Aa
White text reads best on this color (7.16:1).
About this color
#B30019 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.196 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.022 away. White text reads best on it, at 7.16:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.196) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 2.93:1 |
| White text | 7.16:1 |
Values
| HEX | #B30019 |
| RGB | rgb(179, 0, 25) |
| HSL | hsl(352, 100%, 35%) |
| OKLCH | oklch(48.3% 0.196 25.5) |
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 #B30019 | 7.16:1 | AAA | Lc -87.3 | Fine for body text |
| Black text on #B30019 | 2.93:1 | Fails | Lc 21.9 | Dividers and decoration only |
| #B30019 text on white | 7.16:1 | AAA | Lc 82.2 | Fine for body text |
| #B30019 text on black | 2.93:1 | Fails | Lc -19.7 | 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
#FACCC7
oklch(88.4% 0.053 25.4)
-
Step 300
300
#F8A9A1
oklch(80.9% 0.095 25.8)
-
Step 400
400
#F0766E
oklch(70.6% 0.152 25.5)
-
Step 500
500
#E74A48
oklch(63% 0.194 25.3)
-
Step 600
600
#D31E29
oklch(55.6% 0.211 25.5)
-
Step 700
700 (this color)
#B30019
oklch(48.3% 0.196 25.5)
-
Step 800
800
#941119
oklch(42.7% 0.163 25.6)
-
Step 900
900
#771B1B
oklch(37.8% 0.127 25.7)
-
Step 950
950
#461211
oklch(27% 0.08 25.2)
#B30019 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) | #494117 | 0.217 |
| Deuteranopia (no green cones) | #70640D | 0.196 |
| Tritanopia (no blue cones) | #C60010 | 0.041 |
| Achromatopsia (no color) | #585858 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B30019
#B30019
oklch(48.3% 0.196 25.5)
- #006B75
#006B75
oklch(48.2% 0.082 206.1)
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 #B30019, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.022
- Rufous #AE2012 ΔE 0.023
- Scarlet #BE0119 ΔE 0.024
- Lipstick Red #C0022F ΔE 0.034
- Rouge #AB1239 ΔE 0.036
- Rust Red #AA2704 ΔE 0.036
- Brown #A52A2A ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.043
Use #B30019 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.