#528BD1
Closest named color: Dark Sky Blue (#448EE4). oklch(62.9% 0.122 254.5), rgb(82, 139, 209).
Aa
Black text reads best on this color (5.97:1).
About this color
#528BD1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.122 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.029 away. Black text reads best on it, at 5.97:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.97:1 |
| White text | 3.51:1 |
Values
| HEX | #528BD1 |
| RGB | rgb(82, 139, 209) |
| HSL | hsl(213, 58%, 57%) |
| OKLCH | oklch(62.9% 0.122 254.5) |
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 #528BD1 | 3.51:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #528BD1 | 5.97:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #528BD1 text on white | 3.51:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #528BD1 text on black | 5.97:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E7
oklch(80.9% 0.06 254.8)
-
Step 400
400
#77A4DB
oklch(70.8% 0.095 253.9)
-
Step 500
500 (this color)
#528BD1
oklch(62.9% 0.122 254.5)
-
Step 600
600
#3674BF
oklch(55.5% 0.133 254.8)
-
Step 700
700
#2861A5
oklch(49.1% 0.124 254.8)
-
Step 800
800
#235085
oklch(42.8% 0.101 254.3)
-
Step 900
900
#21436B
oklch(37.8% 0.08 253.9)
-
Step 950
950
#14273F
oklch(27% 0.052 255)
#528BD1 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) | #6D8FD4 | 0.033 |
| Deuteranopia (no green cones) | #5C83D0 | 0.022 |
| Tritanopia (no blue cones) | #009BA4 | 0.102 |
| Achromatopsia (no color) | #898989 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #528BD1
#528BD1
oklch(62.9% 0.122 254.5)
- #B47C20
#B47C20
oklch(62.9% 0.122 74.2)
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 #528BD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.029
- Faded Blue #658CBB ΔE 0.039
- Cool Blue #4984B8 ΔE 0.042
- Water Blue #0E87CC ΔE 0.045
- Soft Blue #6488EA ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.047
- Steel Blue #4682B4 ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.052
Use #528BD1 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.