#730003
Closest named color: Blood (#770001). oklch(34.9% 0.143 28.3), rgb(115, 0, 3).
Aa
White text reads best on this color (12.13:1).
About this color
#730003 is a dark, vivid red. In OKLCH its lightness is 35%, its chroma 0.143 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Blood (#770001), ΔE 0.009 away. White text reads best on it, at 12.13:1.
| Hue family | Reds |
| Lightness | dark (35%) |
| Chroma | vivid (0.143) |
| Temperature | warm |
| Nearest name | Blood (#770001) |
| Black text | 1.73:1 |
| White text | 12.13:1 |
Values
| HEX | #730003 |
| RGB | rgb(115, 0, 3) |
| HSL | hsl(358, 100%, 23%) |
| OKLCH | oklch(34.9% 0.143 28.3) |
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 #730003 | 12.13:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #730003 | 1.73:1 | Fails | Lc 8.5 | Not readable |
| #730003 text on white | 12.13:1 | AAA | Lc 95.4 | Preferred for body text |
| #730003 text on black | 1.73:1 | Fails | Lc 0.0 | Not readable |
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 900.
-
Step 50
50
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DE
oklch(93.6% 0.031 30.2)
-
Step 200
200
#FECBC3
oklch(88.5% 0.059 28.6)
-
Step 300
300
#FEA69A
oklch(80.9% 0.106 28.1)
-
Step 400
400
#F96F61
oklch(70.6% 0.172 28.1)
-
Step 500
500
#F13B32
oklch(63% 0.219 28.2)
-
Step 600
600
#D9000C
oklch(55.6% 0.228 28.3)
-
Step 700
700
#B80008
oklch(49.2% 0.201 28.3)
-
Step 800
800
#980005
oklch(42.7% 0.175 28.4)
-
Step 900
900 (this color)
#730003
oklch(34.9% 0.143 28.3)
-
Step 950
950
#490D0A
oklch(26.9% 0.09 27.9)
#730003 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) | #2D2601 | 0.157 |
| Deuteranopia (no green cones) | #473E00 | 0.140 |
| Tritanopia (no blue cones) | #800004 | 0.030 |
| Achromatopsia (no color) | #363636 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #730003
#730003
oklch(34.9% 0.143 28.3)
- #00434B
#00434B
oklch(35% 0.06 208.2)
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 #730003, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blood #770001 ΔE 0.009
- Reddy Brown #6E1005 ΔE 0.015
- Maroon #800000 ΔE 0.030
- Claret #680018 ΔE 0.033
- Wine Red #7B0323 ΔE 0.037
- Bordeaux #7B002C ΔE 0.049
- Chestnut #742802 ΔE 0.055
- Dark Red #8B0000 ΔE 0.055
Use #730003 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.