#239CDB
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.9% 0.137 238.1), rgb(35, 156, 219).
Aa
Black text reads best on this color (6.84:1).
About this color
#239CDB is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.137 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.044 away. Black text reads best on it, at 6.84:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.84:1 |
| White text | 3.06:1 |
Values
| HEX | #239CDB |
| RGB | rgb(35, 156, 219) |
| HSL | hsl(201, 72%, 50%) |
| OKLCH | oklch(65.9% 0.137 238.1) |
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 #239CDB | 3.06:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #239CDB | 6.84:1 | AA | Lc 47.0 | Large or bold text, headings |
| #239CDB text on white | 3.06:1 | AA large text | Lc 57.0 | Large or bold text, headings |
| #239CDB text on black | 6.84:1 | AA | Lc -44.7 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C3DDEF
oklch(88.4% 0.037 238.1)
-
Step 300
300
#98C8E7
oklch(81% 0.067 237)
-
Step 400
400
#5AAADB
oklch(70.7% 0.106 237.7)
-
Step 500
500 (this color)
#239CDB
oklch(65.9% 0.137 238.1)
-
Step 600
600
#007CB3
oklch(55.7% 0.124 238.2)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#032A3F
oklch(27.1% 0.057 238)
#239CDB 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) | #7E9CDE | 0.075 |
| Deuteranopia (no green cones) | #658CDA | 0.059 |
| Tritanopia (no blue cones) | #00ACB2 | 0.088 |
| Achromatopsia (no color) | #939393 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #239CDB
#239CDB
oklch(65.9% 0.137 238.1)
- #CF7A2E
#CF7A2E
oklch(66% 0.137 58.1)
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 #239CDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.045
- Cornflower Blue #6495ED ΔE 0.058
- Water Blue #0E87CC ΔE 0.061
- Faded Blue #658CBB ΔE 0.067
- Dodger Blue #1E90FF ΔE 0.069
- Blue NCS #118AB2 ΔE 0.074
- Cool Blue #4984B8 ΔE 0.074
Use #239CDB 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.