#588BBF
Closest named color: Faded Blue (#658CBB). oklch(62.3% 0.096 250.1), rgb(88, 139, 191).
Aa
Black text reads best on this color (5.86:1).
About this color
#588BBF is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.096 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.016 away. Black text reads best on it, at 5.86:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.86:1 |
| White text | 3.58:1 |
Values
| HEX | #588BBF |
| RGB | rgb(88, 139, 191) |
| HSL | hsl(210, 45%, 55%) |
| OKLCH | oklch(62.3% 0.096 250.1) |
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 #588BBF | 3.58:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #588BBF | 5.86:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #588BBF text on white | 3.58:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #588BBF text on black | 5.86:1 | AA | Lc -38.4 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#AAC4DF
oklch(81% 0.048 249.4)
-
Step 400
400
#7DA5CE
oklch(70.8% 0.074 249.5)
-
Step 500
500 (this color)
#588BBF
oklch(62.3% 0.096 250.1)
-
Step 600
600
#3F77AE
oklch(55.6% 0.105 249.8)
-
Step 700
700
#316496
oklch(49.2% 0.098 250)
-
Step 800
800
#295279
oklch(42.8% 0.08 249.1)
-
Step 900
900
#264462
oklch(37.8% 0.063 249.8)
-
Step 950
950
#172839
oklch(27.1% 0.039 249.5)
#588BBF 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) | #768DC1 | 0.036 |
| Deuteranopia (no green cones) | #6883BE | 0.026 |
| Tritanopia (no blue cones) | #19979D | 0.083 |
| Achromatopsia (no color) | #878787 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588BBF
#588BBF
oklch(62.3% 0.096 250.1)
- #AC7C41
#AC7C41
oklch(62.2% 0.097 70)
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 #588BBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.016
- Cool Blue #4984B8 ΔE 0.028
- Dusty Blue #5A86AD ΔE 0.028
- Off Blue #5684AE ΔE 0.029
- Steel Blue #4682B4 ΔE 0.036
- Silver Lake Blue #778DA9 ΔE 0.049
- Blue NCS #118AB2 ΔE 0.052
- Water Blue #0E87CC ΔE 0.053
Use #588BBF 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.