#688ACF
Closest named color: Faded Blue (#658CBB). oklch(63.7% 0.111 263.6), rgb(104, 138, 207).
Aa
Black text reads best on this color (6.12:1).
About this color
#688ACF is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.111 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.033 away. Black text reads best on it, at 6.12:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.12:1 |
| White text | 3.42:1 |
Values
| HEX | #688ACF |
| RGB | rgb(104, 138, 207) |
| HSL | hsl(220, 52%, 61%) |
| OKLCH | oklch(63.7% 0.111 263.6) |
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 #688ACF | 3.42:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #688ACF | 6.12:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #688ACF text on white | 3.42:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #688ACF 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFDAEE
oklch(88.6% 0.03 262.5)
-
Step 300
300
#AFC1E5
oklch(80.9% 0.055 264.2)
-
Step 400
400
#85A0D8
oklch(70.7% 0.088 264.4)
-
Step 500
500 (this color)
#688ACF
oklch(63.7% 0.111 263.6)
-
Step 600
600
#4E71BA
oklch(55.7% 0.121 263.6)
-
Step 700
700
#3F5EA0
oklch(49.1% 0.112 263.8)
-
Step 800
800
#344D82
oklch(42.7% 0.094 263.8)
-
Step 900
900
#2D4168
oklch(37.8% 0.072 262.8)
-
Step 950
950
#1B263D
oklch(27% 0.046 264.1)
#688ACF 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) | #7090D2 | 0.020 |
| Deuteranopia (no green cones) | #6486CD | 0.012 |
| Tritanopia (no blue cones) | #3A99A3 | 0.100 |
| Achromatopsia (no color) | #8B8B8B | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688ACF
#688ACF
oklch(63.7% 0.111 263.6)
- #AC8530
#AC8530
oklch(63.9% 0.111 83.4)
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 #688ACF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.033
- Soft Blue #6488EA ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.048
- Cool Blue #4984B8 ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.055
- Off Blue #5684AE ΔE 0.057
Use #688ACF 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.