#588BD8
Closest named color: Dark Sky Blue (#448EE4). oklch(63.6% 0.129 258.4), rgb(88, 139, 216).
Aa
Black text reads best on this color (6.09:1).
About this color
#588BD8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.129 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.023 away. Black text reads best on it, at 6.09:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #588BD8 |
| RGB | rgb(88, 139, 216) |
| HSL | hsl(216, 62%, 60%) |
| OKLCH | oklch(63.6% 0.129 258.4) |
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 #588BD8 | 3.44:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #588BD8 | 6.09:1 | AA | Lc 42.3 | Non-text elements, placeholder text |
| #588BD8 text on white | 3.44:1 | AA large text | Lc 61.8 | Content text, not long reading |
| #588BD8 text on black | 6.09:1 | AA | Lc -39.9 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CBDAF1
oklch(88.4% 0.036 258.9)
-
Step 300
300
#A8C2EA
oklch(80.8% 0.064 258.9)
-
Step 400
400
#79A2DF
oklch(70.7% 0.101 258.1)
-
Step 500
500 (this color)
#588BD8
oklch(63.6% 0.129 258.4)
-
Step 600
600
#3B72C4
oklch(55.6% 0.14 258.3)
-
Step 700
700
#2E5FA9
oklch(49.1% 0.13 258.6)
-
Step 800
800
#274E89
oklch(42.7% 0.108 258.5)
-
Step 900
900
#24416E
oklch(37.7% 0.085 258.9)
-
Step 950
950
#162640
oklch(26.9% 0.053 259.7)
#588BD8 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) | #6B91DB | 0.028 |
| Deuteranopia (no green cones) | #5A85D6 | 0.016 |
| Tritanopia (no blue cones) | #009CA7 | 0.110 |
| Achromatopsia (no color) | #8A8A8A | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588BD8
#588BD8
oklch(63.6% 0.129 258.4)
- #B5800F
#B5800F
oklch(63.7% 0.129 78.6)
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 #588BD8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.023
- Soft Blue #6488EA ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.039
- Cornflower Blue #6495ED ΔE 0.041
- Faded Blue #658CBB ΔE 0.046
- Cool Blue #4984B8 ΔE 0.053
- Water Blue #0E87CC ΔE 0.053
- Steel Blue #4682B4 ΔE 0.061
Use #588BD8 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.