#588FB4
Closest named color: Faded Blue (#658CBB). oklch(62.7% 0.081 239.3), rgb(88, 143, 180).
Aa
Black text reads best on this color (6.00:1).
About this color
#588FB4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.081 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.021 away. Black text reads best on it, at 6.00:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.00:1 |
| White text | 3.49:1 |
Values
| HEX | #588FB4 |
| RGB | rgb(88, 143, 180) |
| HSL | hsl(204, 38%, 53%) |
| OKLCH | oklch(62.7% 0.081 239.3) |
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 #588FB4 | 3.49:1 | AA large text | Lc -67.9 | Content text, not long reading |
| Black text on #588FB4 | 6.00:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #588FB4 text on white | 3.49:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #588FB4 text on black | 6.00:1 | AA | Lc -39.3 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CDDCE6
oklch(88.6% 0.021 236.8)
-
Step 300
300
#AAC5D8
oklch(80.9% 0.04 238.7)
-
Step 400
400
#7CA7C4
oklch(70.8% 0.063 238.3)
-
Step 500
500 (this color)
#588FB4
oklch(62.7% 0.081 239.3)
-
Step 600
600
#3D7AA1
oklch(55.6% 0.088 239.1)
-
Step 700
700
#2F678A
oklch(49.2% 0.081 238.9)
-
Step 800
800
#285470
oklch(42.8% 0.067 239)
-
Step 900
900
#25455B
oklch(37.6% 0.054 240.3)
-
Step 950
950
#162935
oklch(27.1% 0.033 237.5)
#588FB4 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) | #7F8EB6 | 0.046 |
| Deuteranopia (no green cones) | #7285B3 | 0.038 |
| Tritanopia (no blue cones) | #27989B | 0.065 |
| Achromatopsia (no color) | #898989 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588FB4
#588FB4
oklch(62.7% 0.081 239.3)
- #AD7C55
#AD7C55
oklch(62.6% 0.081 59.1)
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 #588FB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.021
- Dusty Blue #5A86AD ΔE 0.025
- Off Blue #5684AE ΔE 0.031
- Silver Lake Blue #778DA9 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.039
- Blue Grey #758DA3 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.044
- Light Slate Gray #778899 ΔE 0.050
Use #588FB4 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.