#588CE5
Closest named color: Dark Sky Blue (#448EE4). oklch(64.5% 0.145 260.5), rgb(88, 140, 229).
Aa
Black text reads best on this color (6.29:1).
About this color
#588CE5 is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.145 and its hue 260°. 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 6.29:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.29:1 |
| White text | 3.33:1 |
Values
| HEX | #588CE5 |
| RGB | rgb(88, 140, 229) |
| HSL | hsl(218, 73%, 62%) |
| OKLCH | oklch(64.5% 0.145 260.5) |
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 #588CE5 | 3.33:1 | AA large text | Lc -66.0 | Content text, not long reading |
| Black text on #588CE5 | 6.29:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #588CE5 text on white | 3.33:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #588CE5 text on black | 6.29:1 | AA | Lc -41.2 | 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
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A7C2EF
oklch(81% 0.07 260.6)
-
Step 400
400
#77A1E7
oklch(70.7% 0.113 260.3)
-
Step 500
500 (this color)
#588CE5
oklch(64.5% 0.145 260.5)
-
Step 600
600
#396FCE
oklch(55.5% 0.158 260.8)
-
Step 700
700
#2B5DB2
oklch(49.1% 0.146 260.3)
-
Step 800
800
#254C90
oklch(42.7% 0.121 260.6)
-
Step 900
900
#224073
oklch(37.7% 0.095 260.3)
-
Step 950
950
#152643
oklch(27% 0.059 260.5)
#588CE5 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) | #6594E9 | 0.027 |
| Deuteranopia (no green cones) | #5187E3 | 0.016 |
| Tritanopia (no blue cones) | #00A0AD | 0.123 |
| Achromatopsia (no color) | #8D8D8D | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588CE5
#588CE5
oklch(64.5% 0.145 260.5)
- #B78300
#B78300
oklch(64.5% 0.133 80.5)
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 #588CE5, 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
- Soft Blue #6488EA ΔE 0.018
- Chefchaouen Blue #4895EF ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.030
- Dodger Blue #1E90FF ΔE 0.050
- Cornflower #6A79F7 ΔE 0.060
- Water Blue #0E87CC ΔE 0.064
- Faded Blue #658CBB ΔE 0.065
Use #588CE5 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.