#688ACC
Closest named color: Faded Blue (#658CBB). oklch(63.6% 0.107 262.9), rgb(104, 138, 204).
Aa
Black text reads best on this color (6.09:1).
About this color
#688ACC is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.107 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.029 away. Black text reads best on it, at 6.09:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #688ACC |
| RGB | rgb(104, 138, 204) |
| HSL | hsl(220, 50%, 60%) |
| OKLCH | oklch(63.6% 0.107 262.9) |
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 #688ACC | 3.44:1 | AA large text | Lc -67.3 | Content text, not long reading |
| Black text on #688ACC | 6.09:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #688ACC text on white | 3.44:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #688ACC text on black | 6.09:1 | AA | Lc -39.8 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AFC1E3
oklch(80.9% 0.052 263.1)
-
Step 400
400
#85A1D5
oklch(70.7% 0.083 262.5)
-
Step 500
500 (this color)
#688ACC
oklch(63.6% 0.107 262.9)
-
Step 600
600
#4E71B7
oklch(55.5% 0.117 263)
-
Step 700
700
#3F5F9E
oklch(49.2% 0.108 262.7)
-
Step 800
800
#344E80
oklch(42.8% 0.089 262.4)
-
Step 900
900
#2D4167
oklch(37.7% 0.07 262.4)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#688ACC 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) | #718FCF | 0.019 |
| Deuteranopia (no green cones) | #6686CB | 0.011 |
| Tritanopia (no blue cones) | #3D98A2 | 0.095 |
| Achromatopsia (no color) | #8A8A8A | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688ACC
#688ACC
oklch(63.6% 0.107 262.9)
- #AA8435
#AA8435
oklch(63.5% 0.106 82.8)
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 #688ACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.047
- Soft Blue #6488EA ΔE 0.047
- Cool Blue #4984B8 ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.052
- Off Blue #5684AE ΔE 0.053
- Steel Blue #4682B4 ΔE 0.057
Use #688ACC 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.