#688CBC
Closest named color: Faded Blue (#658CBB). oklch(63.2% 0.083 255.8), rgb(104, 140, 188).
Aa
Black text reads best on this color (6.06:1).
About this color
#688CBC is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.083 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.004 away. Black text reads best on it, at 6.06:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.06:1 |
| White text | 3.46:1 |
Values
| HEX | #688CBC |
| RGB | rgb(104, 140, 188) |
| HSL | hsl(214, 39%, 57%) |
| OKLCH | oklch(63.2% 0.083 255.8) |
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 #688CBC | 3.46:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #688CBC | 6.06:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #688CBC text on white | 3.46:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #688CBC text on black | 6.06:1 | AA | Lc -39.6 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE8
oklch(88.5% 0.022 256.7)
-
Step 300
300
#B0C2DB
oklch(80.8% 0.041 256.6)
-
Step 400
400
#86A3C9
oklch(70.7% 0.065 255.3)
-
Step 500
500 (this color)
#688CBC
oklch(63.2% 0.083 255.8)
-
Step 600
600
#4F75A8
oklch(55.6% 0.091 256.1)
-
Step 700
700
#3F6290
oklch(49.1% 0.085 255.7)
-
Step 800
800
#355075
oklch(42.7% 0.07 256.5)
-
Step 900
900
#2E435E
oklch(37.8% 0.054 255.1)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#688CBC 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) | #7A8EBE | 0.024 |
| Deuteranopia (no green cones) | #7086BB | 0.018 |
| Tritanopia (no blue cones) | #47979C | 0.075 |
| Achromatopsia (no color) | #8A8A8A | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688CBC
#688CBC
oklch(63.2% 0.083 255.8)
- #A7834E
#A7834E
oklch(63.3% 0.083 76)
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 #688CBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.004
- Dusty Blue #5A86AD ΔE 0.032
- Silver Lake Blue #778DA9 ΔE 0.034
- Off Blue #5684AE ΔE 0.037
- Blue Grey #758DA3 ΔE 0.041
- Cool Blue #4984B8 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.050
- Light Slate Gray #778899 ΔE 0.053
Use #688CBC 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.