#539BDE
Closest named color: Cornflower Blue (#6495ED). oklch(67.2% 0.123 248.6), rgb(83, 155, 222).
Aa
Black text reads best on this color (7.11:1).
About this color
#539BDE is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.123 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.034 away. Black text reads best on it, at 7.11:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.11:1 |
| White text | 2.95:1 |
Values
| HEX | #539BDE |
| RGB | rgb(83, 155, 222) |
| HSL | hsl(209, 68%, 60%) |
| OKLCH | oklch(67.2% 0.123 248.6) |
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 #539BDE | 2.95:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #539BDE | 7.11:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #539BDE text on white | 2.95:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #539BDE text on black | 7.11:1 | AAA | Lc -46.0 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF9
oklch(93.7% 0.022 248.1)
-
Step 200
200
#C4DCF5
oklch(88.5% 0.043 249.4)
-
Step 300
300
#9AC5F1
oklch(80.8% 0.078 249.4)
-
Step 400
400 (this color)
#539BDE
oklch(67.2% 0.123 248.6)
-
Step 500
500
#248EE3
oklch(63.1% 0.157 248.4)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#004475
oklch(37.8% 0.103 248.3)
-
Step 950
950
#062844
oklch(27% 0.065 248)
#539BDE 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) | #7E9EE1 | 0.047 |
| Deuteranopia (no green cones) | #6B90DD | 0.035 |
| Tritanopia (no blue cones) | #00ABB3 | 0.097 |
| Achromatopsia (no color) | #969696 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #539BDE
#539BDE
oklch(67.2% 0.123 248.6)
- #C78635
#C78635
oklch(67.2% 0.124 68.4)
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 #539BDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.034
- Chefchaouen Blue #4895EF ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.042
- Soft Blue #6488EA ΔE 0.058
- Faded Blue #658CBB ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.071
- Greyblue #77A1B5 ΔE 0.076
- Water Blue #0E87CC ΔE 0.076
Use #539BDE 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.