#588FD1
Closest named color: Dark Sky Blue (#448EE4). oklch(64.1% 0.116 253.9), rgb(88, 143, 209).
Aa
Black text reads best on this color (6.26:1).
About this color
#588FD1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.116 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.033 away. Black text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.26:1 |
| White text | 3.35:1 |
Values
| HEX | #588FD1 |
| RGB | rgb(88, 143, 209) |
| HSL | hsl(213, 57%, 58%) |
| OKLCH | oklch(64.1% 0.116 253.9) |
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 #588FD1 | 3.35:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #588FD1 | 6.26:1 | AA | Lc 43.3 | Non-text elements, placeholder text |
| #588FD1 text on white | 3.35:1 | AA large text | Lc 60.8 | Content text, not long reading |
| #588FD1 text on black | 6.26:1 | AA | Lc -40.9 | 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
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A8C3E5
oklch(80.9% 0.057 254.3)
-
Step 400
400
#79A4D8
oklch(70.8% 0.09 253.7)
-
Step 500
500 (this color)
#588FD1
oklch(64.1% 0.116 253.9)
-
Step 600
600
#3975BB
oklch(55.6% 0.126 253.9)
-
Step 700
700
#2B62A1
oklch(49.1% 0.117 253.8)
-
Step 800
800
#255082
oklch(42.7% 0.096 253.9)
-
Step 900
900
#234369
oklch(37.8% 0.076 253.9)
-
Step 950
950
#15273D
oklch(26.9% 0.048 254.2)
#588FD1 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) | #7493D4 | 0.035 |
| Deuteranopia (no green cones) | #6487D0 | 0.023 |
| Tritanopia (no blue cones) | #009EA7 | 0.098 |
| Achromatopsia (no color) | #8C8C8C | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588FD1
#588FD1
oklch(64.1% 0.116 253.9)
- #B6812F
#B6812F
oklch(64.2% 0.116 74.3)
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 #588FD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.033
- Faded Blue #658CBB ΔE 0.034
- Chefchaouen Blue #4895EF ΔE 0.045
- Cornflower Blue #6495ED ΔE 0.046
- Soft Blue #6488EA ΔE 0.048
- Cool Blue #4984B8 ΔE 0.049
- Water Blue #0E87CC ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.055
Use #588FD1 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.