#6588BC
Closest named color: Faded Blue (#658CBB). oklch(62.2% 0.089 258.1), rgb(101, 136, 188).
Aa
Black text reads best on this color (5.80:1).
About this color
#6588BC is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.089 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.012 away. Black text reads best on it, at 5.80:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.80:1 |
| White text | 3.61:1 |
Values
| HEX | #6588BC |
| RGB | rgb(101, 136, 188) |
| HSL | hsl(216, 39%, 57%) |
| OKLCH | oklch(62.2% 0.089 258.1) |
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 #6588BC | 3.61:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #6588BC | 5.80:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #6588BC text on white | 3.61:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #6588BC text on black | 5.80:1 | AA | Lc -38.0 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B0C2DD
oklch(80.9% 0.043 258.4)
-
Step 400
400
#86A2CC
oklch(70.6% 0.069 258.3)
-
Step 500
500 (this color)
#6588BC
oklch(62.2% 0.089 258.1)
-
Step 600
600
#4F74AB
oklch(55.6% 0.096 258.1)
-
Step 700
700
#406193
oklch(49.1% 0.09 258.5)
-
Step 800
800
#355077
oklch(42.8% 0.073 257.6)
-
Step 900
900
#2E4260
oklch(37.6% 0.058 258.3)
-
Step 950
950
#1B2738
oklch(27% 0.036 257.1)
#6588BC 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) | #748BBE | 0.021 |
| Deuteranopia (no green cones) | #6A83BB | 0.014 |
| Tritanopia (no blue cones) | #42939A | 0.078 |
| Achromatopsia (no color) | #868686 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6588BC
#6588BC
oklch(62.2% 0.089 258.1)
- #A48045
#A48045
oklch(62.2% 0.089 78.3)
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 #6588BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.012
- Dusty Blue #5A86AD ΔE 0.027
- Off Blue #5684AE ΔE 0.030
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.041
- Silver Lake Blue #778DA9 ΔE 0.042
- Blue Grey #758DA3 ΔE 0.048
- Light Slate Gray #778899 ΔE 0.057
Use #6588BC 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.