#588FB8
Closest named color: Faded Blue (#658CBB). oklch(62.9% 0.085 242.1), rgb(88, 143, 184).
Aa
Black text reads best on this color (6.03:1).
About this color
#588FB8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.085 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.017 away. Black text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.03:1 |
| White text | 3.47:1 |
Values
| HEX | #588FB8 |
| RGB | rgb(88, 143, 184) |
| HSL | hsl(206, 40%, 53%) |
| OKLCH | oklch(62.9% 0.085 242.1) |
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 #588FB8 | 3.47:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #588FB8 | 6.03:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #588FB8 text on white | 3.47:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #588FB8 text on black | 6.03:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDBE7
oklch(88.4% 0.023 241.9)
-
Step 300
300
#AAC5DA
oklch(81% 0.042 241.5)
-
Step 400
400
#7CA6C7
oklch(70.7% 0.067 242.5)
-
Step 500
500 (this color)
#588FB8
oklch(62.9% 0.085 242.1)
-
Step 600
600
#3D79A5
oklch(55.5% 0.093 242.7)
-
Step 700
700
#2E668D
oklch(49.1% 0.086 241.9)
-
Step 800
800
#275373
oklch(42.6% 0.072 242.6)
-
Step 900
900
#25455D
oklch(37.7% 0.056 242.6)
-
Step 950
950
#162936
oklch(27.1% 0.035 239.7)
#588FB8 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) | #7D8FBA | 0.044 |
| Deuteranopia (no green cones) | #7085B7 | 0.036 |
| Tritanopia (no blue cones) | #22999D | 0.070 |
| Achromatopsia (no color) | #898989 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588FB8
#588FB8
oklch(62.9% 0.085 242.1)
- #AE7D51
#AE7D51
oklch(62.9% 0.085 62.2)
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 #588FB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.017
- Dusty Blue #5A86AD ΔE 0.027
- Off Blue #5684AE ΔE 0.032
- Cool Blue #4984B8 ΔE 0.037
- Silver Lake Blue #778DA9 ΔE 0.039
- Blue Grey #758DA3 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.043
- Blue NCS #118AB2 ΔE 0.051
Use #588FB8 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.