#588CCB
Closest named color: Faded Blue (#658CBB). oklch(63.1% 0.111 254.1), rgb(88, 140, 203).
Aa
Black text reads best on this color (6.02:1).
About this color
#588CCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.111 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.027 away. Black text reads best on it, at 6.02:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.02:1 |
| White text | 3.48:1 |
Values
| HEX | #588CCB |
| RGB | rgb(88, 140, 203) |
| HSL | hsl(213, 53%, 57%) |
| OKLCH | oklch(63.1% 0.111 254.1) |
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 #588CCB | 3.48:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #588CCB | 6.02:1 | AA | Lc 41.8 | Non-text elements, placeholder text |
| #588CCB text on white | 3.48:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #588CCB text on black | 6.02:1 | AA | Lc -39.5 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBED
oklch(88.6% 0.03 253)
-
Step 300
300
#A9C3E4
oklch(80.9% 0.055 254.5)
-
Step 400
400
#7BA4D6
oklch(70.8% 0.086 253.8)
-
Step 500
500 (this color)
#588CCB
oklch(63.1% 0.111 254.1)
-
Step 600
600
#3C75B8
oklch(55.6% 0.121 253.9)
-
Step 700
700
#2E629E
oklch(49.1% 0.112 253.8)
-
Step 800
800
#275080
oklch(42.6% 0.093 253.9)
-
Step 900
900
#254367
oklch(37.8% 0.072 254)
-
Step 950
950
#16273C
oklch(26.9% 0.046 254.4)
#588CCB 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) | #728FCE | 0.032 |
| Deuteranopia (no green cones) | #6384CA | 0.023 |
| Tritanopia (no blue cones) | #009AA2 | 0.097 |
| Achromatopsia (no color) | #898989 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588CCB
#588CCB
oklch(63.1% 0.111 254.1)
- #B17E32
#B17E32
oklch(63% 0.111 73.8)
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 #588CCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.027
- Cool Blue #4984B8 ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.039
- Dusty Blue #5A86AD ΔE 0.045
- Off Blue #5684AE ΔE 0.046
- Steel Blue #4682B4 ΔE 0.047
- Water Blue #0E87CC ΔE 0.050
- Soft Blue #6488EA ΔE 0.053
Use #588CCB 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.