#539FFC
Closest named color: Cornflower Blue (#6495ED). oklch(69.7% 0.157 254.8), rgb(83, 159, 252).
Aa
Black text reads best on this color (7.73:1).
About this color
#539FFC is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.157 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.032 away. Black text reads best on it, at 7.73:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.73:1 |
| White text | 2.71:1 |
Values
| HEX | #539FFC |
| RGB | rgb(83, 159, 252) |
| HSL | hsl(213, 97%, 66%) |
| OKLCH | oklch(69.7% 0.157 254.8) |
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 #539FFC | 2.71:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #539FFC | 7.73:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #539FFC text on white | 2.71:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #539FFC text on black | 7.73:1 | AAA | Lc -49.6 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C1DCFD
oklch(88.5% 0.054 253.6)
-
Step 300
300
#95C4FF
oklch(80.9% 0.098 254.5)
-
Step 400
400 (this color)
#539FFC
oklch(69.7% 0.157 254.8)
-
Step 500
500
#1087FE
oklch(63% 0.2 254.8)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900
#004081
oklch(37.7% 0.124 254.9)
-
Step 950
950
#03264D
oklch(27% 0.082 254.4)
#539FFC 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) | #75A6FF | 0.040 |
| Deuteranopia (no green cones) | #5D96FA | 0.023 |
| Tritanopia (no blue cones) | #00B5C1 | 0.125 |
| Achromatopsia (no color) | #9D9D9D | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #539FFC
#539FFC
oklch(69.7% 0.157 254.8)
- #D28E00
#D28E00
oklch(69.8% 0.147 75)
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 #539FFC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.033
- Dodger Blue #1E90FF ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.057
- Soft Blue #6488EA ΔE 0.061
- Periwinkle Blue #8F99FB ΔE 0.064
- Perrywinkle #8F8CE7 ΔE 0.078
- Lavender Blue #8B88F8 ΔE 0.078
Use #539FFC 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.