#BB2507
Closest named color: Rusty Red (#AF2F0D). oklch(51.4% 0.189 32.3), rgb(187, 37, 7).
Aa
White text reads best on this color (6.21:1).
About this color
#BB2507 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.189 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.024 away. White text reads best on it, at 6.21:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.189) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.38:1 |
| White text | 6.21:1 |
Values
| HEX | #BB2507 |
| RGB | rgb(187, 37, 7) |
| HSL | hsl(10, 93%, 38%) |
| OKLCH | oklch(51.4% 0.189 32.3) |
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 #BB2507 | 6.21:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #BB2507 | 3.38:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #BB2507 text on white | 6.21:1 | AA | Lc 79.2 | Fine for body text |
| #BB2507 text on black | 3.38:1 | AA large text | Lc -22.6 | 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
#FEF3F0
oklch(97.2% 0.013 35.7)
-
Step 100
100
#FBE4DF
oklch(93.6% 0.026 32.2)
-
Step 200
200
#F9CEC4
oklch(88.6% 0.051 33.3)
-
Step 300
300
#F6AB9B
oklch(80.9% 0.092 32.5)
-
Step 400
400
#ED7A64
oklch(70.6% 0.146 32.2)
-
Step 500
500
#E45138
oklch(63.1% 0.187 32.1)
-
Step 600
600
#CF2B0B
oklch(55.5% 0.203 32.2)
-
Step 700
700 (this color)
#BB2507
oklch(51.4% 0.189 32.3)
-
Step 800
800
#911B05
oklch(42.7% 0.156 32.2)
-
Step 900
900
#751F10
oklch(37.7% 0.122 32.3)
-
Step 950
950
#45140B
oklch(27% 0.078 32.5)
#BB2507 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) | #574C00 | 0.201 |
| Deuteranopia (no green cones) | #7B6D00 | 0.181 |
| Tritanopia (no blue cones) | #CF0022 | 0.046 |
| Achromatopsia (no color) | #616161 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #BB2507
#BB2507
oklch(51.4% 0.189 32.3)
- #007485
#007485
oklch(51.3% 0.09 212.3)
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 #BB2507, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.024
- Firebrick #B22222 ΔE 0.026
- Scarlet #BE0119 ΔE 0.028
- Rufous #AE2012 ΔE 0.030
- Rust Red #AA2704 ΔE 0.035
- Sinopia #BB3E03 ΔE 0.037
- Lipstick Red #C0022F ΔE 0.043
- Dull Red #BB3F3F ΔE 0.049
Use #BB2507 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.