#588CD1
Closest named color: Dark Sky Blue (#448EE4). oklch(63.4% 0.119 256), rgb(88, 140, 209).
Aa
Black text reads best on this color (6.08:1).
About this color
#588CD1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.119 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.031 away. Black text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.08:1 |
| White text | 3.45:1 |
Values
| HEX | #588CD1 |
| RGB | rgb(88, 140, 209) |
| HSL | hsl(214, 57%, 58%) |
| OKLCH | oklch(63.4% 0.119 256) |
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 #588CD1 | 3.45:1 | AA large text | Lc -67.3 | Content text, not long reading |
| Black text on #588CD1 | 6.08:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #588CD1 text on white | 3.45:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #588CD1 text on black | 6.08:1 | AA | Lc -39.8 | 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
#CCDBEF
oklch(88.6% 0.032 255.6)
-
Step 300
300
#A9C3E6
oklch(81% 0.057 255.9)
-
Step 400
400
#7AA3DA
oklch(70.7% 0.093 256)
-
Step 500
500 (this color)
#588CD1
oklch(63.4% 0.119 256)
-
Step 600
600
#3C74BD
oklch(55.7% 0.128 256)
-
Step 700
700
#2E61A3
oklch(49.2% 0.119 256)
-
Step 800
800
#274F84
oklch(42.6% 0.099 256.3)
-
Step 900
900
#24426A
oklch(37.6% 0.078 256.2)
-
Step 950
950
#16273E
oklch(27% 0.049 256.3)
#588CD1 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) | #6F90D4 | 0.030 |
| Deuteranopia (no green cones) | #6085D0 | 0.019 |
| Tritanopia (no blue cones) | #009CA5 | 0.103 |
| Achromatopsia (no color) | #8A8A8A | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588CD1
#588CD1
oklch(63.4% 0.119 256)
- #B37F27
#B37F27
oklch(63.4% 0.119 75.9)
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 #588CD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.031
- Faded Blue #658CBB ΔE 0.035
- Soft Blue #6488EA ΔE 0.044
- Cool Blue #4984B8 ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.047
- Cornflower Blue #6495ED ΔE 0.048
- Water Blue #0E87CC ΔE 0.051
- Steel Blue #4682B4 ΔE 0.054
Use #588CD1 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.