#239DE9
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.9% 0.151 242.9), rgb(35, 157, 233).
Aa
Black text reads best on this color (7.07:1).
About this color
#239DE9 is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.151 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.030 away. Black text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.07:1 |
| White text | 2.96:1 |
Values
| HEX | #239DE9 |
| RGB | rgb(35, 157, 233) |
| HSL | hsl(203, 82%, 53%) |
| OKLCH | oklch(66.9% 0.151 242.9) |
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 #239DE9 | 2.96:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #239DE9 | 7.07:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #239DE9 text on white | 2.96:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #239DE9 text on black | 7.07:1 | AAA | Lc -46.0 | Large or bold text, headings |
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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C3DDF3
oklch(88.5% 0.041 243.7)
-
Step 300
300
#97C7ED
oklch(80.9% 0.074 242.6)
-
Step 400
400
#58A8E4
oklch(70.6% 0.118 243.3)
-
Step 500
500 (this color)
#239DE9
oklch(66.9% 0.151 242.9)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#00466D
oklch(37.8% 0.09 242.2)
-
Step 950
950
#022942
oklch(27% 0.062 242.6)
#239DE9 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) | #799FEC | 0.068 |
| Deuteranopia (no green cones) | #5D8EE8 | 0.051 |
| Tritanopia (no blue cones) | #00B0B8 | 0.104 |
| Achromatopsia (no color) | #969696 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #239DE9
#239DE9
oklch(66.9% 0.151 242.9)
- #D47C09
#D47C09
oklch(66.8% 0.151 62.6)
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 #239DE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.040
- Cornflower Blue #6495ED ΔE 0.048
- Dodger Blue #1E90FF ΔE 0.052
- Soft Blue #6488EA ΔE 0.067
- Water Blue #0E87CC ΔE 0.071
- Faded Blue #658CBB ΔE 0.080
- Cool Blue #4984B8 ΔE 0.088
Use #239DE9 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.