#688BC9
Closest named color: Faded Blue (#658CBB). oklch(63.7% 0.102 261.4), rgb(104, 139, 201).
Aa
Black text reads best on this color (6.12:1).
About this color
#688BC9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.102 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.023 away. Black text reads best on it, at 6.12:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.12:1 |
| White text | 3.42:1 |
Values
| HEX | #688BC9 |
| RGB | rgb(104, 139, 201) |
| HSL | hsl(218, 47%, 60%) |
| OKLCH | oklch(63.7% 0.102 261.4) |
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 #688BC9 | 3.42:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #688BC9 | 6.12:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #688BC9 text on white | 3.42:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #688BC9 text on black | 6.12:1 | AA | Lc -40.0 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC2E2
oklch(81% 0.05 260.9)
-
Step 400
400
#85A1D3
oklch(70.7% 0.08 261.8)
-
Step 500
500 (this color)
#688BC9
oklch(63.7% 0.102 261.4)
-
Step 600
600
#4E72B4
oklch(55.6% 0.111 261.7)
-
Step 700
700
#3F609B
oklch(49.2% 0.103 261.3)
-
Step 800
800
#344E7D
oklch(42.6% 0.085 261.5)
-
Step 900
900
#2D4165
oklch(37.6% 0.067 261.5)
-
Step 950
950
#1B263B
oklch(26.9% 0.042 262.7)
#688BC9 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) | #7490CC | 0.021 |
| Deuteranopia (no green cones) | #6986C8 | 0.013 |
| Tritanopia (no blue cones) | #3F98A1 | 0.091 |
| Achromatopsia (no color) | #8B8B8B | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688BC9
#688BC9
oklch(63.7% 0.102 261.4)
- #AA843B
#AA843B
oklch(63.5% 0.102 81.4)
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 #688BC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.047
- Cool Blue #4984B8 ΔE 0.048
- Off Blue #5684AE ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.050
- Soft Blue #6488EA ΔE 0.053
- Silver Lake Blue #778DA9 ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.055
Use #688BC9 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.