#688BC5
Closest named color: Faded Blue (#658CBB). oklch(63.5% 0.096 260.2), rgb(104, 139, 197).
Aa
Black text reads best on this color (6.08:1).
About this color
#688BC5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.096 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.017 away. Black text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.08:1 |
| White text | 3.44:1 |
Values
| HEX | #688BC5 |
| RGB | rgb(104, 139, 197) |
| HSL | hsl(217, 44%, 59%) |
| OKLCH | oklch(63.5% 0.096 260.2) |
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 #688BC5 | 3.44:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #688BC5 | 6.08:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #688BC5 text on white | 3.44:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #688BC5 text on black | 6.08:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AFC2E0
oklch(80.9% 0.047 259.5)
-
Step 400
400
#85A2D0
oklch(70.7% 0.075 259.5)
-
Step 500
500 (this color)
#688BC5
oklch(63.5% 0.096 260.2)
-
Step 600
600
#4E73B0
oklch(55.6% 0.104 260)
-
Step 700
700
#3F6098
oklch(49.1% 0.098 260.4)
-
Step 800
800
#344F7B
oklch(42.7% 0.081 259.8)
-
Step 900
900
#2E4263
oklch(37.8% 0.062 260.1)
-
Step 950
950
#1B273A
oklch(27.1% 0.039 259.4)
#688BC5 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) | #758FC8 | 0.021 |
| Deuteranopia (no green cones) | #6B86C4 | 0.014 |
| Tritanopia (no blue cones) | #42989F | 0.087 |
| Achromatopsia (no color) | #8A8A8A | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688BC5
#688BC5
oklch(63.5% 0.096 260.2)
- #A98441
#A98441
oklch(63.5% 0.096 80.4)
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 #688BC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.017
- Dusty Blue #5A86AD ΔE 0.042
- Off Blue #5684AE ΔE 0.045
- Cool Blue #4984B8 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.048
- Steel Blue #4682B4 ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.055
- Blue Grey #758DA3 ΔE 0.056
Use #688BC5 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.