#259CEB
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.8% 0.153 244.2), rgb(37, 156, 235).
Aa
Black text reads best on this color (7.03:1).
About this color
#259CEB is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.153 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.027 away. Black text reads best on it, at 7.03:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.03:1 |
| White text | 2.98:1 |
Values
| HEX | #259CEB |
| RGB | rgb(37, 156, 235) |
| HSL | hsl(204, 83%, 53%) |
| OKLCH | oklch(66.8% 0.153 244.2) |
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 #259CEB | 2.98:1 | Fails | Lc -61.3 | Content text, not long reading |
| Black text on #259CEB | 7.03:1 | AAA | Lc 48.1 | Large or bold text, headings |
| #259CEB text on white | 2.98:1 | Fails | Lc 56.0 | Large or bold text, headings |
| #259CEB text on black | 7.03:1 | AAA | Lc -45.8 | 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
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C3DDF3
oklch(88.5% 0.041 243.7)
-
Step 300
300
#97C7EE
oklch(81% 0.075 243.4)
-
Step 400
400
#59A8E6
oklch(70.7% 0.12 244.4)
-
Step 500
500 (this color)
#259CEB
oklch(66.8% 0.153 244.2)
-
Step 600
600
#0079BD
oklch(55.5% 0.138 244.2)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#032943
oklch(27.1% 0.063 244.1)
#259CEB 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) | #769FEE | 0.065 |
| Deuteranopia (no green cones) | #5B8DEA | 0.049 |
| Tritanopia (no blue cones) | #00AFB9 | 0.105 |
| Achromatopsia (no color) | #959595 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #259CEB
#259CEB
oklch(66.8% 0.153 244.2)
- #D37D00
#D37D00
oklch(66.8% 0.151 64.1)
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 #259CEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.038
- Cornflower Blue #6495ED ΔE 0.046
- Dodger Blue #1E90FF ΔE 0.048
- Soft Blue #6488EA ΔE 0.064
- Water Blue #0E87CC ΔE 0.070
- Faded Blue #658CBB ΔE 0.081
- Cool Blue #4984B8 ΔE 0.089
Use #259CEB 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.