#528BA9
Closest named color: Dusty Blue (#5A86AD). oklch(61% 0.075 232.8), rgb(82, 139, 169).
Aa
Black text reads best on this color (5.62:1).
About this color
#528BA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.075 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.019 away. Black text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #528BA9 |
| RGB | rgb(82, 139, 169) |
| HSL | hsl(201, 35%, 49%) |
| OKLCH | oklch(61% 0.075 232.8) |
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 #528BA9 | 3.73:1 | AA large text | Lc -70.3 | Content text, not long reading |
| Black text on #528BA9 | 5.62:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #528BA9 text on white | 3.73:1 | AA large text | Lc 64.8 | Content text, not long reading |
| #528BA9 text on black | 5.62:1 | AA | Lc -36.9 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#AAC5D5
oklch(80.8% 0.037 233.9)
-
Step 400
400
#7CA7C0
oklch(70.6% 0.059 234.2)
-
Step 500
500 (this color)
#528BA9
oklch(61% 0.075 232.8)
-
Step 600
600
#3C7B9B
oklch(55.5% 0.082 233)
-
Step 700
700
#2D6885
oklch(49.1% 0.077 232.7)
-
Step 800
800
#27556C
oklch(42.8% 0.063 232.6)
-
Step 900
900
#254657
oklch(37.7% 0.048 232.5)
-
Step 950
950
#162933
oklch(26.9% 0.031 232.5)
#528BA9 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) | #7D89AB | 0.051 |
| Deuteranopia (no green cones) | #7080A9 | 0.044 |
| Tritanopia (no blue cones) | #219395 | 0.056 |
| Achromatopsia (no color) | #848484 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #528BA9
#528BA9
oklch(61% 0.075 232.8)
- #A77658
#A77658
oklch(60.8% 0.075 52.3)
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 #528BA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.019
- Off Blue #5684AE ΔE 0.024
- Faded Blue #658CBB ΔE 0.036
- Cool Blue #4984B8 ΔE 0.036
- Steel Blue #4682B4 ΔE 0.038
- Blue NCS #118AB2 ΔE 0.041
- Blue Grey #758DA3 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.044
Use #528BA9 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.