#588BBB
Closest named color: Faded Blue (#658CBB). oklch(62.1% 0.091 248.1), rgb(88, 139, 187).
Aa
Black text reads best on this color (5.82:1).
About this color
#588BBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.091 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.015 away. Black text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.82:1 |
| White text | 3.60:1 |
Values
| HEX | #588BBB |
| RGB | rgb(88, 139, 187) |
| HSL | hsl(209, 42%, 54%) |
| OKLCH | oklch(62.1% 0.091 248.1) |
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 #588BBB | 3.60:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #588BBB | 5.82:1 | AA | Lc 40.6 | Non-text elements, placeholder text |
| #588BBB text on white | 3.60:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #588BBB text on black | 5.82:1 | AA | Lc -38.2 | 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
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CDDBE9
oklch(88.5% 0.025 248.1)
-
Step 300
300
#ABC4DD
oklch(81% 0.045 248.4)
-
Step 400
400
#7DA5CC
oklch(70.7% 0.072 248.2)
-
Step 500
500 (this color)
#588BBB
oklch(62.1% 0.091 248.1)
-
Step 600
600
#4078AB
oklch(55.7% 0.099 248)
-
Step 700
700
#316492
oklch(49% 0.092 248.1)
-
Step 800
800
#2A5277
oklch(42.7% 0.077 248.4)
-
Step 900
900
#264460
oklch(37.7% 0.06 248.1)
-
Step 950
950
#172838
oklch(27% 0.038 247.9)
#588BBB 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) | #778CBD | 0.037 |
| Deuteranopia (no green cones) | #6A82BA | 0.030 |
| Tritanopia (no blue cones) | #1F969B | 0.079 |
| Achromatopsia (no color) | #878787 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588BBB
#588BBB
oklch(62.1% 0.091 248.1)
- #AB7C46
#AB7C46
oklch(62.2% 0.092 68.6)
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 #588BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.015
- Dusty Blue #5A86AD ΔE 0.022
- Off Blue #5684AE ΔE 0.025
- Cool Blue #4984B8 ΔE 0.027
- Steel Blue #4682B4 ΔE 0.034
- Silver Lake Blue #778DA9 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.050
- Blue NCS #118AB2 ΔE 0.050
Use #588BBB 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.