#539FCD
Closest named color: Greyblue (#77A1B5). oklch(67.3% 0.102 237.5), rgb(83, 159, 205).
Aa
Black text reads best on this color (7.20:1).
About this color
#539FCD is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.102 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.050 away. Black text reads best on it, at 7.20:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.20:1 |
| White text | 2.91:1 |
Values
| HEX | #539FCD |
| RGB | rgb(83, 159, 205) |
| HSL | hsl(203, 55%, 56%) |
| OKLCH | oklch(67.3% 0.102 237.5) |
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 #539FCD | 2.91:1 | Fails | Lc -60.6 | Content text, not long reading |
| Black text on #539FCD | 7.20:1 | AAA | Lc 48.7 | Large or bold text, headings |
| #539FCD text on white | 2.91:1 | Fails | Lc 55.3 | Large or bold text, headings |
| #539FCD text on black | 7.20:1 | AAA | Lc -46.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDEE
oklch(88.4% 0.036 237.6)
-
Step 300
300
#9AC7E5
oklch(80.8% 0.064 237.8)
-
Step 400
400 (this color)
#539FCD
oklch(67.3% 0.102 237.5)
-
Step 500
500
#1F93CE
oklch(63% 0.13 237.7)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#052A3D
oklch(27% 0.053 236.3)
#539FCD 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) | #8A9ECF | 0.060 |
| Deuteranopia (no green cones) | #7992CC | 0.050 |
| Tritanopia (no blue cones) | #00ABAE | 0.076 |
| Achromatopsia (no color) | #979797 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #539FCD
#539FCD
oklch(67.3% 0.102 237.5)
- #C58655
#C58655
oklch(67.3% 0.101 57.8)
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 #539FCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.050
- Faded Blue #658CBB ΔE 0.053
- Turquoise Blue #06B1C4 ΔE 0.062
- Cornflower Blue #6495ED ΔE 0.064
- Chefchaouen Blue #4895EF ΔE 0.065
- Silver Lake Blue #778DA9 ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.067
- Bluegrey #85A3B2 ΔE 0.067
Use #539FCD 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.