#579BCD
Closest named color: Faded Blue (#658CBB). oklch(66.5% 0.102 242.3), rgb(87, 155, 205).
Aa
Black text reads best on this color (6.97:1).
About this color
#579BCD is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.102 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.043 away. Black text reads best on it, at 6.97:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.97:1 |
| White text | 3.01:1 |
Values
| HEX | #579BCD |
| RGB | rgb(87, 155, 205) |
| HSL | hsl(205, 54%, 57%) |
| OKLCH | oklch(66.5% 0.102 242.3) |
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 #579BCD | 3.01:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #579BCD | 6.97:1 | AA | Lc 47.4 | Large or bold text, headings |
| #579BCD text on white | 3.01:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #579BCD text on black | 6.97:1 | AA | Lc -45.1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A5C5DF
oklch(80.9% 0.05 242.9)
-
Step 400
400
#74A7CE
oklch(70.7% 0.079 242.1)
-
Step 500
500 (this color)
#579BCD
oklch(66.5% 0.102 242.3)
-
Step 600
600
#2C7AAE
oklch(55.6% 0.11 242.1)
-
Step 700
700
#1D6696
oklch(49% 0.104 242.7)
-
Step 800
800
#1B5479
oklch(42.8% 0.084 241.5)
-
Step 900
900
#1D4562
oklch(37.6% 0.067 242.9)
-
Step 950
950
#122939
oklch(27% 0.042 241)
#579BCD 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) | #859BCF | 0.051 |
| Deuteranopia (no green cones) | #758FCC | 0.043 |
| Tritanopia (no blue cones) | #00A7AC | 0.080 |
| Achromatopsia (no color) | #959595 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579BCD
#579BCD
oklch(66.5% 0.102 242.3)
- #C0854E
#C0854E
oklch(66.5% 0.102 62.6)
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 #579BCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.043
- Greyblue #77A1B5 ΔE 0.055
- Cornflower Blue #6495ED ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.062
- Dusty Blue #5A86AD ΔE 0.066
- Blue Grey #758DA3 ΔE 0.067
Use #579BCD 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.