#528FB9
Closest named color: Faded Blue (#658CBB). oklch(62.6% 0.09 240.4), rgb(82, 143, 185).
Aa
Black text reads best on this color (5.98:1).
About this color
#528FB9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.090 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.021 away. Black text reads best on it, at 5.98:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.98:1 |
| White text | 3.50:1 |
Values
| HEX | #528FB9 |
| RGB | rgb(82, 143, 185) |
| HSL | hsl(204, 42%, 52%) |
| OKLCH | oklch(62.6% 0.09 240.4) |
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 #528FB9 | 3.50:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #528FB9 | 5.98:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #528FB9 text on white | 3.50:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #528FB9 text on black | 5.98:1 | AA | Lc -39.2 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A8C5DB
oklch(80.9% 0.044 240.9)
-
Step 400
400
#78A7C9
oklch(70.7% 0.071 240.4)
-
Step 500
500 (this color)
#528FB9
oklch(62.6% 0.09 240.4)
-
Step 600
600
#367AA7
oklch(55.6% 0.098 240.7)
-
Step 700
700
#27678F
oklch(49.2% 0.091 239.9)
-
Step 800
800
#225474
oklch(42.7% 0.075 240)
-
Step 900
900
#22455E
oklch(37.6% 0.059 241.7)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#528FB9 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) | #7C8FBB | 0.048 |
| Deuteranopia (no green cones) | #6E84B8 | 0.041 |
| Tritanopia (no blue cones) | #00999D | 0.072 |
| Achromatopsia (no color) | #898989 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #528FB9
#528FB9
oklch(62.6% 0.09 240.4)
- #B07B4E
#B07B4E
oklch(62.7% 0.09 60.4)
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 #528FB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.021
- Dusty Blue #5A86AD ΔE 0.027
- Off Blue #5684AE ΔE 0.031
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.040
- Silver Lake Blue #778DA9 ΔE 0.045
- Blue NCS #118AB2 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.048
Use #528FB9 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.