#528AC4
Closest named color: Cool Blue (#4984B8). oklch(62% 0.106 250.7), rgb(82, 138, 196).
Aa
Black text reads best on this color (5.79:1).
About this color
#528AC4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.106 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.025 away. Black text reads best on it, at 5.79:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.79:1 |
| White text | 3.62:1 |
Values
| HEX | #528AC4 |
| RGB | rgb(82, 138, 196) |
| HSL | hsl(211, 49%, 55%) |
| OKLCH | oklch(62% 0.106 250.7) |
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 #528AC4 | 3.62:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #528AC4 | 5.79:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #528AC4 text on white | 3.62:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #528AC4 text on black | 5.79:1 | AA | Lc -38.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A8C4E2
oklch(81% 0.052 250.3)
-
Step 400
400
#79A5D3
oklch(70.8% 0.083 250.2)
-
Step 500
500 (this color)
#528AC4
oklch(62% 0.106 250.7)
-
Step 600
600
#3977B4
oklch(55.7% 0.115 250.3)
-
Step 700
700
#2B639B
oklch(49% 0.108 251)
-
Step 800
800
#25517E
oklch(42.7% 0.09 251.2)
-
Step 900
900
#234465
oklch(37.8% 0.069 250.1)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#528AC4 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) | #728CC7 | 0.038 |
| Deuteranopia (no green cones) | #6381C3 | 0.029 |
| Tritanopia (no blue cones) | #00979E | 0.089 |
| Achromatopsia (no color) | #868686 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #528AC4
#528AC4
oklch(62% 0.106 250.7)
- #AE7A36
#AE7A36
oklch(61.9% 0.106 70.7)
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 #528AC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.025
- Faded Blue #658CBB ΔE 0.026
- Off Blue #5684AE ΔE 0.034
- Steel Blue #4682B4 ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.034
- Water Blue #0E87CC ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.048
- Blue NCS #118AB2 ΔE 0.051
Use #528AC4 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.