#579FC4
Closest named color: Greyblue (#77A1B5). oklch(67% 0.091 232.7), rgb(87, 159, 196).
Aa
Black text reads best on this color (7.16:1).
About this color
#579FC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.091 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.040 away. Black text reads best on it, at 7.16:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.16:1 |
| White text | 2.93:1 |
Values
| HEX | #579FC4 |
| RGB | rgb(87, 159, 196) |
| HSL | hsl(200, 48%, 55%) |
| OKLCH | oklch(67% 0.091 232.7) |
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 #579FC4 | 2.93:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #579FC4 | 7.16:1 | AAA | Lc 48.4 | Large or bold text, headings |
| #579FC4 text on white | 2.93:1 | Fails | Lc 55.6 | Large or bold text, headings |
| #579FC4 text on black | 7.16:1 | AAA | Lc -46.2 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C6DDEB
oklch(88.5% 0.031 234.5)
-
Step 300
300
#9DC8E0
oklch(81% 0.057 232.8)
-
Step 400
400 (this color)
#579FC4
oklch(67% 0.091 232.7)
-
Step 500
500
#2B95C4
oklch(63.2% 0.116 232.6)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#044863
oklch(37.8% 0.076 232.5)
-
Step 950
950
#082A3A
oklch(27% 0.048 233.3)
#579FC4 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) | #8D9DC6 | 0.060 |
| Deuteranopia (no green cones) | #7E92C3 | 0.052 |
| Tritanopia (no blue cones) | #00A9AB | 0.068 |
| Achromatopsia (no color) | #979797 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579FC4
#579FC4
oklch(67% 0.091 232.7)
- #C28660
#C28660
oklch(67.2% 0.091 52.9)
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 #579FC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.040
- Faded Blue #658CBB ΔE 0.052
- Cadet Blue #5F9EA0 ΔE 0.054
- Bluegrey #85A3B2 ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.058
- Silver Lake Blue #778DA9 ΔE 0.059
- Bluey Grey #89A0B0 ΔE 0.061
- Blue Grey #758DA3 ΔE 0.063
Use #579FC4 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.