#528EEF
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.3% 0.158 259.6), rgb(82, 142, 239).
Aa
Black text reads best on this color (6.47:1).
About this color
#528EEF is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.158 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.019 away. Black text reads best on it, at 6.47:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.47:1 |
| White text | 3.24:1 |
Values
| HEX | #528EEF |
| RGB | rgb(82, 142, 239) |
| HSL | hsl(217, 83%, 63%) |
| OKLCH | oklch(65.3% 0.158 259.6) |
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 #528EEF | 3.24:1 | AA large text | Lc -64.9 | Content text, not long reading |
| Black text on #528EEF | 6.47:1 | AA | Lc 44.6 | Non-text elements, placeholder text |
| #528EEF text on white | 3.24:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #528EEF text on black | 6.47:1 | AA | Lc -42.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A3C2F3
oklch(80.9% 0.077 259.4)
-
Step 400
400
#71A1ED
oklch(70.7% 0.124 259.3)
-
Step 500
500 (this color)
#528EEF
oklch(65.3% 0.158 259.6)
-
Step 600
600
#2E6FD6
oklch(55.7% 0.172 259.5)
-
Step 700
700
#215CB9
oklch(49.1% 0.159 259.5)
-
Step 800
800
#1D4C96
oklch(42.8% 0.132 259.4)
-
Step 900
900
#1D4077
oklch(37.7% 0.102 259.2)
-
Step 950
950
#122646
oklch(27.1% 0.065 259.4)
#528EEF 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) | #6197F3 | 0.030 |
| Deuteranopia (no green cones) | #4988ED | 0.019 |
| Tritanopia (no blue cones) | #00A4B3 | 0.128 |
| Achromatopsia (no color) | #8F8F8F | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #528EEF
#528EEF
oklch(65.3% 0.158 259.6)
- #BB8500
#BB8500
oklch(65.3% 0.135 79.9)
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 #528EEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.019
- Dark Sky Blue #448EE4 ΔE 0.021
- Soft Blue #6488EA ΔE 0.022
- Cornflower Blue #6495ED ΔE 0.028
- Dodger Blue #1E90FF ΔE 0.037
- Cornflower #6A79F7 ΔE 0.058
- Lavender Blue #8B88F8 ΔE 0.069
- Clear Blue #247AFD ΔE 0.071
Use #528EEF 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.