#F53604
Closest named color: Vermillion (#F4320C). oklch(63.1% 0.23 33.1), rgb(245, 54, 4).
Aa
Black text reads best on this color (5.41:1).
About this color
#F53604 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.230 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.006 away. Black text reads best on it, at 5.41:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.230) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.41:1 |
| White text | 3.88:1 |
Values
| HEX | #F53604 |
| RGB | rgb(245, 54, 4) |
| HSL | hsl(12, 97%, 49%) |
| OKLCH | oklch(63.1% 0.23 33.1) |
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 #F53604 | 3.88:1 | AA large text | Lc -69.9 | Content text, not long reading |
| Black text on #F53604 | 5.41:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #F53604 text on white | 3.88:1 | AA large text | Lc 64.4 | Content text, not long reading |
| #F53604 text on black | 5.41:1 | AA | Lc -37.3 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FFE3DC
oklch(93.7% 0.032 34.3)
-
Step 200
200
#FFCBBF
oklch(88.5% 0.062 33.2)
-
Step 300
300
#FFA693
oklch(80.9% 0.11 32.7)
-
Step 400
400
#FC6E51
oklch(70.7% 0.18 33.2)
-
Step 500
500 (this color)
#F53604
oklch(63.1% 0.23 33.1)
-
Step 600
600
#D02B00
oklch(55.7% 0.205 33.2)
-
Step 700
700
#B02300
oklch(49.2% 0.18 33.2)
-
Step 800
800
#911B00
oklch(42.6% 0.157 33.2)
-
Step 900
900
#7A1500
oklch(37.6% 0.138 33.2)
-
Step 950
950
#4B0C02
oklch(27.1% 0.095 33.1)
#F53604 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) | #756600 | 0.243 |
| Deuteranopia (no green cones) | #A39000 | 0.217 |
| Tritanopia (no blue cones) | #FF0031 | 0.046 |
| Achromatopsia (no color) | #818181 | 0.232 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F53604
#F53604
oklch(63.1% 0.23 33.1)
- #009AB1
#009AB1
oklch(63% 0.11 213.1)
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 #F53604, closest first.
No curated palette has a color within ΔE 0.04 of #F53604.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.006
- Red Orange #FD3C06 ΔE 0.019
- Orangey Red #FA4224 ΔE 0.021
- Tomato Red #EC2D01 ΔE 0.023
- Orangered #FE420F ΔE 0.026
- Orange Red #FF4500 ΔE 0.031
- Fire Engine Red #FE0002 ΔE 0.032
- Red #FF0000 ΔE 0.032
Use #F53604 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.