#579DD4
Closest named color: Cornflower Blue (#6495ED). oklch(67.3% 0.108 244.1), rgb(87, 157, 212).
Aa
Black text reads best on this color (7.17:1).
About this color
#579DD4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.108 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.050 away. Black text reads best on it, at 7.17:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.17:1 |
| White text | 2.92:1 |
Values
| HEX | #579DD4 |
| RGB | rgb(87, 157, 212) |
| HSL | hsl(206, 59%, 59%) |
| OKLCH | oklch(67.3% 0.108 244.1) |
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 #579DD4 | 2.92:1 | Fails | Lc -60.8 | Content text, not long reading |
| Black text on #579DD4 | 7.17:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #579DD4 text on white | 2.92:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #579DD4 text on black | 7.17:1 | AAA | Lc -46.3 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDF1
oklch(88.6% 0.038 243.3)
-
Step 300
300
#9CC6EA
oklch(80.9% 0.068 244.6)
-
Step 400
400 (this color)
#579DD4
oklch(67.3% 0.108 244.1)
-
Step 500
500
#2B90D6
oklch(63% 0.138 244.2)
-
Step 600
600
#0079BD
oklch(55.5% 0.138 244.2)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#05456E
oklch(37.7% 0.091 244.7)
-
Step 950
950
#082940
oklch(27% 0.057 243.6)
#579DD4 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) | #859ED7 | 0.051 |
| Deuteranopia (no green cones) | #7491D3 | 0.041 |
| Tritanopia (no blue cones) | #00AAB0 | 0.085 |
| Achromatopsia (no color) | #979797 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579DD4
#579DD4
oklch(67.3% 0.108 244.1)
- #C4874A
#C4874A
oklch(67.2% 0.108 64.1)
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 #579DD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.050
- Faded Blue #658CBB ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.057
- Greyblue #77A1B5 ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.071
- Soft Blue #6488EA ΔE 0.072
- Turquoise Blue #06B1C4 ΔE 0.074
Use #579DD4 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.