#688CCB
Closest named color: Faded Blue (#658CBB). oklch(64% 0.104 261.1), rgb(104, 140, 203).
Aa
Black text reads best on this color (6.20:1).
About this color
#688CCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.104 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.025 away. Black text reads best on it, at 6.20:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.20:1 |
| White text | 3.38:1 |
Values
| HEX | #688CCB |
| RGB | rgb(104, 140, 203) |
| HSL | hsl(218, 49%, 60%) |
| OKLCH | oklch(64% 0.104 261.1) |
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 #688CCB | 3.38:1 | AA large text | Lc -66.7 | Content text, not long reading |
| Black text on #688CCB | 6.20:1 | AA | Lc 42.8 | Non-text elements, placeholder text |
| #688CCB text on white | 3.38:1 | AA large text | Lc 61.2 | Content text, not long reading |
| #688CCB text on black | 6.20:1 | AA | Lc -40.5 | 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
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC2E2
oklch(81% 0.05 260.9)
-
Step 400
400
#84A1D4
oklch(70.6% 0.082 261.5)
-
Step 500
500 (this color)
#688CCB
oklch(64% 0.104 261.1)
-
Step 600
600
#4D72B5
oklch(55.6% 0.113 261.5)
-
Step 700
700
#3E609C
oklch(49.2% 0.104 261)
-
Step 800
800
#334E7E
oklch(42.6% 0.087 261.2)
-
Step 900
900
#2D4165
oklch(37.6% 0.067 261.5)
-
Step 950
950
#1A263B
oklch(26.8% 0.043 261.2)
#688CCB 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) | #7491CE | 0.021 |
| Deuteranopia (no green cones) | #6987CA | 0.013 |
| Tritanopia (no blue cones) | #3D9AA2 | 0.094 |
| Achromatopsia (no color) | #8B8B8B | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688CCB
#688CCB
oklch(64% 0.104 261.1)
- #AC853B
#AC853B
oklch(64% 0.103 81)
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 #688CCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.048
- Dusty Blue #5A86AD ΔE 0.050
- Cool Blue #4984B8 ΔE 0.050
- Soft Blue #6488EA ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.051
- Off Blue #5684AE ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.055
Use #688CCB 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.