#579CDF
Closest named color: Cornflower Blue (#6495ED). oklch(67.6% 0.122 249.4), rgb(87, 156, 223).
Aa
Black text reads best on this color (7.22:1).
About this color
#579CDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.122 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.033 away. Black text reads best on it, at 7.22:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.22:1 |
| White text | 2.90:1 |
Values
| HEX | #579CDF |
| RGB | rgb(87, 156, 223) |
| HSL | hsl(210, 68%, 61%) |
| OKLCH | oklch(67.6% 0.122 249.4) |
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 #579CDF | 2.90:1 | Fails | Lc -60.5 | Content text, not long reading |
| Black text on #579CDF | 7.22:1 | AAA | Lc 48.9 | Large or bold text, headings |
| #579CDF text on white | 2.90:1 | Fails | Lc 55.2 | Large or bold text, headings |
| #579CDF text on black | 7.22:1 | AAA | Lc -46.6 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C4DCF5
oklch(88.5% 0.043 249.4)
-
Step 300
300
#9BC5F0
oklch(80.9% 0.076 249.4)
-
Step 400
400 (this color)
#579CDF
oklch(67.6% 0.122 249.4)
-
Step 500
500
#2A8DE3
oklch(63% 0.157 249.6)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#054375
oklch(37.6% 0.103 249.9)
-
Step 950
950
#082844
oklch(27% 0.064 249)
#579CDF 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) | #7F9FE2 | 0.045 |
| Deuteranopia (no green cones) | #6D91DE | 0.034 |
| Tritanopia (no blue cones) | #00ACB4 | 0.098 |
| Achromatopsia (no color) | #979797 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579CDF
#579CDF
oklch(67.6% 0.122 249.4)
- #C78838
#C78838
oklch(67.6% 0.122 69.2)
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 #579CDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.046
- Soft Blue #6488EA ΔE 0.060
- Faded Blue #658CBB ΔE 0.060
- Dodger Blue #1E90FF ΔE 0.073
- Greyblue #77A1B5 ΔE 0.074
- Perrywinkle #8F8CE7 ΔE 0.076
Use #579CDF 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.