#688CC4
Closest named color: Faded Blue (#658CBB). oklch(63.6% 0.094 259), rgb(104, 140, 196).
Aa
Black text reads best on this color (6.13:1).
About this color
#688CC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.094 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.015 away. Black text reads best on it, at 6.13:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.13:1 |
| White text | 3.42:1 |
Values
| HEX | #688CC4 |
| RGB | rgb(104, 140, 196) |
| HSL | hsl(217, 44%, 59%) |
| OKLCH | oklch(63.6% 0.094 259) |
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 #688CC4 | 3.42:1 | AA large text | Lc -67.1 | Content text, not long reading |
| Black text on #688CC4 | 6.13:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #688CC4 text on white | 3.42:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #688CC4 text on black | 6.13:1 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#85A2CF
oklch(70.7% 0.074 259)
-
Step 500
500 (this color)
#688CC4
oklch(63.6% 0.094 259)
-
Step 600
600
#4E74AF
oklch(55.7% 0.102 258.9)
-
Step 700
700
#3F6196
oklch(49.2% 0.094 259)
-
Step 800
800
#344F7A
oklch(42.7% 0.079 259.4)
-
Step 900
900
#2D4262
oklch(37.7% 0.061 258.6)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#688CC4 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) | #7790C6 | 0.023 |
| Deuteranopia (no green cones) | #6C87C3 | 0.014 |
| Tritanopia (no blue cones) | #4298A0 | 0.083 |
| Achromatopsia (no color) | #8B8B8B | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688CC4
#688CC4
oklch(63.6% 0.094 259)
- #AA8444
#AA8444
oklch(63.7% 0.094 78.8)
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 #688CC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.015
- Dusty Blue #5A86AD ΔE 0.041
- Off Blue #5684AE ΔE 0.044
- Silver Lake Blue #778DA9 ΔE 0.045
- Cool Blue #4984B8 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.053
- Steel Blue #4682B4 ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.056
Use #688CC4 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.