#539BEE
Closest named color: Chefchaouen Blue (#4895EF). oklch(68% 0.143 253.5), rgb(83, 155, 238).
Aa
Black text reads best on this color (7.29:1).
About this color
#539BEE is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.143 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.020 away. Black text reads best on it, at 7.29:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.29:1 |
| White text | 2.88:1 |
Values
| HEX | #539BEE |
| RGB | rgb(83, 155, 238) |
| HSL | hsl(212, 82%, 63%) |
| OKLCH | oklch(68% 0.143 253.5) |
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 #539BEE | 2.88:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #539BEE | 7.29:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #539BEE text on white | 2.88:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #539BEE text on black | 7.29:1 | AAA | Lc -47.0 | 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 400.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C3DCFA
oklch(88.6% 0.049 253.1)
-
Step 300
300
#98C4FA
oklch(80.9% 0.09 253.9)
-
Step 400
400 (this color)
#539BEE
oklch(68% 0.143 253.5)
-
Step 500
500
#208AF4
oklch(63.2% 0.183 253.4)
-
Step 600
600
#0072D5
oklch(55.5% 0.175 253.6)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#004E95
oklch(42.6% 0.134 253.6)
-
Step 900
900
#00417E
oklch(37.7% 0.118 253.6)
-
Step 950
950
#05274A
oklch(27.1% 0.075 252.9)
#539BEE 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) | #77A0F1 | 0.041 |
| Deuteranopia (no green cones) | #6191EC | 0.027 |
| Tritanopia (no blue cones) | #00AEB9 | 0.114 |
| Achromatopsia (no color) | #989898 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #539BEE
#539BEE
oklch(68% 0.143 253.5)
- #CC8807
#CC8807
oklch(67.9% 0.143 73.5)
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 #539BEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.020
- Cornflower Blue #6495ED ΔE 0.020
- Dark Sky Blue #448EE4 ΔE 0.040
- Soft Blue #6488EA ΔE 0.050
- Dodger Blue #1E90FF ΔE 0.055
- Periwinkle Blue #8F99FB ΔE 0.070
- Perrywinkle #8F8CE7 ΔE 0.073
- Faded Blue #658CBB ΔE 0.078
Use #539BEE 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.