#F34A03
Closest named color: Blood Orange (#FE4B03). oklch(64.5% 0.215 37), rgb(243, 74, 3).
Aa
Black text reads best on this color (5.79:1).
About this color
#F34A03 is a medium-light, vivid red. In OKLCH its lightness is 64%, its chroma 0.215 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Blood Orange (#FE4B03), ΔE 0.022 away. Black text reads best on it, at 5.79:1.
| Hue family | Reds |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.215) |
| Temperature | warm |
| Nearest name | Blood Orange (#FE4B03) |
| Black text | 5.79:1 |
| White text | 3.62:1 |
Values
| HEX | #F34A03 |
| RGB | rgb(243, 74, 3) |
| HSL | hsl(18, 98%, 48%) |
| OKLCH | oklch(64.5% 0.215 37) |
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 #F34A03 | 3.62:1 | AA large text | Lc -67.9 | Content text, not long reading |
| Black text on #F34A03 | 5.79:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #F34A03 text on white | 3.62:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #F34A03 text on black | 5.79:1 | AA | Lc -39.2 | 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
#FDE3DC
oklch(93.5% 0.03 35.5)
-
Step 200
200
#FDCDBE
oklch(88.6% 0.058 38.1)
-
Step 300
300
#FCA990
oklch(81% 0.105 37.5)
-
Step 400
400
#F6744F
oklch(70.6% 0.168 36.7)
-
Step 500
500 (this color)
#F34A03
oklch(64.5% 0.215 37)
-
Step 600
600
#C83B00
oklch(55.7% 0.186 37.1)
-
Step 700
700
#A93000
oklch(49.1% 0.164 37)
-
Step 800
800
#8C2600
oklch(42.7% 0.143 37)
-
Step 900
900
#761F00
oklch(37.8% 0.126 37.1)
-
Step 950
950
#481001
oklch(26.9% 0.089 36.8)
#F34A03 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) | #7E6E00 | 0.219 |
| Deuteranopia (no green cones) | #A79400 | 0.197 |
| Tritanopia (no blue cones) | #FF0040 | 0.078 |
| Achromatopsia (no color) | #868686 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F34A03
#F34A03
oklch(64.5% 0.215 37)
- #009EBB
#009EBB
oklch(64.5% 0.115 217)
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 #F34A03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blood Orange #FE4B03 ΔE 0.022
- Orangered #FE420F ΔE 0.022
- Orange Red #FF4500 ΔE 0.022
- Orangey Red #FA4224 ΔE 0.023
- Red Orange #FD3C06 ΔE 0.024
- Orange Pant #FB5607 ΔE 0.027
- Vermillion #F4320C ΔE 0.031
- Bright Orange #FF5B00 ΔE 0.040
Use #F34A03 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.