#579CEC
Closest named color: Cornflower Blue (#6495ED). oklch(68.3% 0.138 253.5), rgb(87, 156, 236).
Aa
Black text reads best on this color (7.37:1).
About this color
#579CEC is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.138 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.021 away. Black text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.37:1 |
| White text | 2.84:1 |
Values
| HEX | #579CEC |
| RGB | rgb(87, 156, 236) |
| HSL | hsl(212, 80%, 63%) |
| OKLCH | oklch(68.3% 0.138 253.5) |
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 #579CEC | 2.84:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #579CEC | 7.37:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #579CEC text on white | 2.84:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #579CEC text on black | 7.37:1 | AAA | Lc -47.5 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DCF9
oklch(88.6% 0.048 253.2)
-
Step 300
300
#9AC4F8
oklch(80.9% 0.087 254.1)
-
Step 400
400 (this color)
#579CEC
oklch(68.3% 0.138 253.5)
-
Step 500
500
#288AF0
oklch(63.1% 0.176 253.5)
-
Step 600
600
#0072D5
oklch(55.5% 0.175 253.6)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#004E95
oklch(42.6% 0.134 253.6)
-
Step 900
900
#03417C
oklch(37.6% 0.115 253.5)
-
Step 950
950
#072749
oklch(27.1% 0.073 253.3)
#579CEC 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) | #79A1EF | 0.039 |
| Deuteranopia (no green cones) | #6593EA | 0.025 |
| Tritanopia (no blue cones) | #00AEB9 | 0.111 |
| Achromatopsia (no color) | #999999 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #579CEC
#579CEC
oklch(68.3% 0.138 253.5)
- #CC8A1B
#CC8A1B
oklch(68.4% 0.138 73.4)
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 #579CEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.021
- Chefchaouen Blue #4895EF ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.044
- Soft Blue #6488EA ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.061
- Periwinkle Blue #8F99FB ΔE 0.068
- Perrywinkle #8F8CE7 ΔE 0.071
- Faded Blue #658CBB ΔE 0.076
Use #579CEC 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.