#688CB3
Closest named color: Faded Blue (#658CBB). oklch(62.8% 0.072 251), rgb(104, 140, 179).
Aa
Black text reads best on this color (5.99:1).
About this color
#688CB3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.072 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.013 away. Black text reads best on it, at 5.99:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.99:1 |
| White text | 3.50:1 |
Values
| HEX | #688CB3 |
| RGB | rgb(104, 140, 179) |
| HSL | hsl(211, 33%, 55%) |
| OKLCH | oklch(62.8% 0.072 251) |
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 #688CB3 | 3.50:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #688CB3 | 5.99:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #688CB3 text on white | 3.50:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #688CB3 text on black | 5.99:1 | AA | Lc -39.1 | 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
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B0C3D7
oklch(80.9% 0.035 249.6)
-
Step 400
400
#87A4C3
oklch(70.8% 0.056 250.3)
-
Step 500
500 (this color)
#688CB3
oklch(62.8% 0.072 251)
-
Step 600
600
#5076A0
oklch(55.5% 0.079 251.7)
-
Step 700
700
#416389
oklch(49.1% 0.073 252.1)
-
Step 800
800
#35516F
oklch(42.6% 0.061 251)
-
Step 900
900
#2F435A
oklch(37.6% 0.047 252.5)
-
Step 950
950
#1C2835
oklch(27.2% 0.029 250.9)
#688CB3 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) | #7D8DB5 | 0.027 |
| Deuteranopia (no green cones) | #7486B2 | 0.021 |
| Tritanopia (no blue cones) | #4C9599 | 0.062 |
| Achromatopsia (no color) | #898989 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688CB3
#688CB3
oklch(62.8% 0.072 251)
- #A48258
#A48258
oklch(62.9% 0.071 71.8)
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 #688CB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.013
- Silver Lake Blue #778DA9 ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.026
- Blue Grey #758DA3 ΔE 0.029
- Off Blue #5684AE ΔE 0.033
- Light Slate Gray #778899 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.044
- Steel #738595 ΔE 0.045
Use #688CB3 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.