#578CFF
Closest named color: Soft Blue (#6488EA). oklch(66% 0.18 263.6), rgb(87, 140, 255).
Aa
Black text reads best on this color (6.60:1).
About this color
#578CFF is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.180 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.033 away. Black text reads best on it, at 6.60:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.60:1 |
| White text | 3.18:1 |
Values
| HEX | #578CFF |
| RGB | rgb(87, 140, 255) |
| HSL | hsl(221, 100%, 67%) |
| OKLCH | oklch(66% 0.18 263.6) |
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 #578CFF | 3.18:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #578CFF | 6.60:1 | AA | Lc 45.4 | Large or bold text, headings |
| #578CFF text on white | 3.18:1 | AA large text | Lc 58.6 | Large or bold text, headings |
| #578CFF text on black | 6.60:1 | AA | Lc -43.1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C9DAFA
oklch(88.6% 0.048 263.1)
-
Step 300
300
#A3C1FA
oklch(80.9% 0.087 263)
-
Step 400
400
#729EF8
oklch(70.7% 0.141 263.5)
-
Step 500
500 (this color)
#578CFF
oklch(66% 0.18 263.6)
-
Step 600
600
#3469E4
oklch(55.7% 0.196 263.7)
-
Step 700
700
#2756C6
oklch(49.1% 0.182 263.7)
-
Step 800
800
#2147A0
oklch(42.6% 0.151 263.7)
-
Step 900
900
#1F3D7F
oklch(37.7% 0.118 263.4)
-
Step 950
950
#13244A
oklch(26.9% 0.074 264)
#578CFF 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) | #5399FF | 0.033 |
| Deuteranopia (no green cones) | #3389FD | 0.031 |
| Tritanopia (no blue cones) | #00A7B9 | 0.149 |
| Achromatopsia (no color) | #909090 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578CFF
#578CFF
oklch(66% 0.18 263.6)
- #BA8900
#BA8900
oklch(66% 0.136 83.1)
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 #578CFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.033
- Dodger Blue #1E90FF ΔE 0.036
- Chefchaouen Blue #4895EF ΔE 0.038
- Cornflower Blue #6495ED ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.046
- Cornflower #6A79F7 ΔE 0.048
- Lavender Blue #8B88F8 ΔE 0.062
- Clear Blue #247AFD ΔE 0.065
Use #578CFF 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.