#579DC4
Closest named color: Greyblue (#77A1B5). oklch(66.6% 0.091 234.8), rgb(87, 157, 196).
Aa
Black text reads best on this color (7.02:1).
About this color
#579DC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.091 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.043 away. Black text reads best on it, at 7.02:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.02:1 |
| White text | 2.98:1 |
Values
| HEX | #579DC4 |
| RGB | rgb(87, 157, 196) |
| HSL | hsl(201, 48%, 55%) |
| OKLCH | oklch(66.6% 0.091 234.8) |
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 #579DC4 | 2.98:1 | Fails | Lc -61.7 | Content text, not long reading |
| Black text on #579DC4 | 7.02:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #579DC4 text on white | 2.98:1 | Fails | Lc 56.4 | Large or bold text, headings |
| #579DC4 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
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A5C6DA
oklch(80.9% 0.045 234.7)
-
Step 400
400
#74A8C7
oklch(70.7% 0.071 235.3)
-
Step 500
500 (this color)
#579DC4
oklch(66.6% 0.091 234.8)
-
Step 600
600
#2B7CA5
oklch(55.6% 0.099 234.9)
-
Step 700
700
#1C688D
oklch(49% 0.092 234.9)
-
Step 800
800
#1B5573
oklch(42.7% 0.077 235.5)
-
Step 900
900
#1D465D
oklch(37.6% 0.06 236.1)
-
Step 950
950
#122936
oklch(26.9% 0.038 235.3)
#579DC4 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) | #8B9CC6 | 0.058 |
| Deuteranopia (no green cones) | #7B90C3 | 0.050 |
| Tritanopia (no blue cones) | #00A7AA | 0.069 |
| Achromatopsia (no color) | #959595 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579DC4
#579DC4
oklch(66.6% 0.091 234.8)
- #C0855C
#C0855C
oklch(66.7% 0.092 55.2)
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 #579DC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.043
- Faded Blue #658CBB ΔE 0.046
- Cadet Blue #5F9EA0 ΔE 0.056
- Silver Lake Blue #778DA9 ΔE 0.056
- Blue Grey #758DA3 ΔE 0.060
- Bluegrey #85A3B2 ΔE 0.061
- Turquoise Blue #06B1C4 ΔE 0.063
- Bluey Grey #89A0B0 ΔE 0.063
Use #579DC4 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.