#ED510A
Closest named color: Orange Pant (#FB5607). oklch(64.3% 0.203 38.9), rgb(237, 81, 10).
Aa
Black text reads best on this color (5.78:1).
About this color
#ED510A is a medium-light, vivid red. In OKLCH its lightness is 64%, its chroma 0.203 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Orange Pant (#FB5607), ΔE 0.030 away. Black text reads best on it, at 5.78:1.
| Hue family | Reds |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.203) |
| Temperature | warm |
| Nearest name | Orange Pant (#FB5607) |
| Black text | 5.78:1 |
| White text | 3.63:1 |
Values
| HEX | #ED510A |
| RGB | rgb(237, 81, 10) |
| HSL | hsl(19, 92%, 48%) |
| OKLCH | oklch(64.3% 0.203 38.9) |
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 #ED510A | 3.63:1 | AA large text | Lc -68.2 | Content text, not long reading |
| Black text on #ED510A | 5.78:1 | AA | Lc 41.4 | Non-text elements, placeholder text |
| #ED510A text on white | 3.63:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #ED510A text on black | 5.78:1 | AA | Lc -39.0 | 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
#FEF3EF
oklch(97.2% 0.013 41.2)
-
Step 100
100
#FCE4DC
oklch(93.6% 0.029 39.3)
-
Step 200
200
#FBCEBF
oklch(88.6% 0.055 39.3)
-
Step 300
300
#F9AB91
oklch(81% 0.099 39.2)
-
Step 400
400
#F17950
oklch(70.7% 0.158 39.2)
-
Step 500
500 (this color)
#ED510A
oklch(64.3% 0.203 38.9)
-
Step 600
600
#C54000
oklch(55.7% 0.179 38.9)
-
Step 700
700
#A63500
oklch(49.1% 0.157 39.1)
-
Step 800
800
#892A00
oklch(42.6% 0.137 39)
-
Step 900
900
#742200
oklch(37.8% 0.121 38.9)
-
Step 950
950
#461301
oklch(27% 0.083 39.7)
#ED510A 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) | #807000 | 0.203 |
| Deuteranopia (no green cones) | #A69300 | 0.183 |
| Tritanopia (no blue cones) | #FF1A46 | 0.085 |
| Achromatopsia (no color) | #868686 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #ED510A
#ED510A
oklch(64.3% 0.203 38.9)
- #009DBC
#009DBC
oklch(64.3% 0.116 218.5)
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 #ED510A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Orange Pant #FB5607 ΔE 0.030
- Blood Orange #FE4B03 ΔE 0.031
- Orangey Red #FA4224 ΔE 0.034
- Orange Red #FF4500 ΔE 0.034
- Deep Orange #DC4D01 ΔE 0.035
- Orangered #FE420F ΔE 0.035
- Red Orange #FD3C06 ΔE 0.037
- Bright Orange #FF5B00 ΔE 0.041
Use #ED510A 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.