#578FE7
Closest named color: Dark Sky Blue (#448EE4). oklch(65.2% 0.145 259.1), rgb(87, 143, 231).
Aa
Black text reads best on this color (6.48:1).
About this color
#578FE7 is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.145 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.018 away. Black text reads best on it, at 6.48:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.48:1 |
| White text | 3.23:1 |
Values
| HEX | #578FE7 |
| RGB | rgb(87, 143, 231) |
| HSL | hsl(217, 75%, 62%) |
| OKLCH | oklch(65.2% 0.145 259.1) |
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 #578FE7 | 3.23:1 | AA large text | Lc -64.8 | Content text, not long reading |
| Black text on #578FE7 | 6.48:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #578FE7 text on white | 3.23:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #578FE7 text on black | 6.48:1 | AA | Lc -42.3 | Non-text elements, placeholder text |
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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A5C2EF
oklch(80.8% 0.071 259.1)
-
Step 400
400
#75A1E7
oklch(70.6% 0.114 259.4)
-
Step 500
500 (this color)
#578FE7
oklch(65.2% 0.145 259.1)
-
Step 600
600
#3470CE
oklch(55.6% 0.158 259.2)
-
Step 700
700
#275DB2
oklch(49% 0.147 259.3)
-
Step 800
800
#224D90
oklch(42.8% 0.121 259.1)
-
Step 900
900
#204173
oklch(37.8% 0.094 258.6)
-
Step 950
950
#142643
oklch(27% 0.059 259.5)
#578FE7 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) | #6996EB | 0.029 |
| Deuteranopia (no green cones) | #5489E5 | 0.017 |
| Tritanopia (no blue cones) | #00A3B0 | 0.121 |
| Achromatopsia (no color) | #8F8F8F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578FE7
#578FE7
oklch(65.2% 0.145 259.1)
- #BB8400
#BB8400
oklch(65.1% 0.135 79.2)
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 #578FE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.018
- Chefchaouen Blue #4895EF ΔE 0.020
- Soft Blue #6488EA ΔE 0.022
- Cornflower Blue #6495ED ΔE 0.023
- Dodger Blue #1E90FF ΔE 0.048
- Cornflower #6A79F7 ΔE 0.065
- Faded Blue #658CBB ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.067
Use #578FE7 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.