#579CCB
Closest named color: Faded Blue (#658CBB). oklch(66.7% 0.099 240.3), rgb(87, 156, 203).
Aa
Black text reads best on this color (7.02:1).
About this color
#579CCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.099 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.045 away. Black text reads best on it, at 7.02:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.02:1 |
| White text | 2.99:1 |
Values
| HEX | #579CCB |
| RGB | rgb(87, 156, 203) |
| HSL | hsl(204, 53%, 57%) |
| OKLCH | oklch(66.7% 0.099 240.3) |
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 #579CCB | 2.99:1 | Fails | Lc -61.7 | Content text, not long reading |
| Black text on #579CCB | 7.02:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #579CCB text on white | 2.99:1 | Fails | Lc 56.4 | Large or bold text, headings |
| #579CCB text on black | 7.02:1 | AAA | Lc -45.4 | 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 500.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A5C5DD
oklch(80.8% 0.048 240.6)
-
Step 400
400
#73A7CC
oklch(70.6% 0.077 240.2)
-
Step 500
500 (this color)
#579CCB
oklch(66.7% 0.099 240.3)
-
Step 600
600
#2B7AAC
oklch(55.5% 0.108 240.8)
-
Step 700
700
#1C6794
oklch(49.1% 0.101 240.5)
-
Step 800
800
#1B5478
oklch(42.7% 0.083 240.8)
-
Step 900
900
#1D4660
oklch(37.8% 0.064 239.4)
-
Step 950
950
#122938
oklch(27% 0.04 239.2)
#579CCB 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) | #879CCD | 0.054 |
| Deuteranopia (no green cones) | #7790CA | 0.044 |
| Tritanopia (no blue cones) | #00A8AC | 0.078 |
| Achromatopsia (no color) | #959595 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579CCB
#579CCB
oklch(66.7% 0.099 240.3)
- #C18553
#C18553
oklch(66.6% 0.099 59.7)
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 #579CCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.045
- Greyblue #77A1B5 ΔE 0.051
- Silver Lake Blue #778DA9 ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.063
- Dark Sky Blue #448EE4 ΔE 0.063
- Blue Grey #758DA3 ΔE 0.066
- Dusty Blue #5A86AD ΔE 0.067
Use #579CCB 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.