#688BBD
Closest named color: Faded Blue (#658CBB). oklch(63.1% 0.086 257.3), rgb(104, 139, 189).
Aa
Black text reads best on this color (6.01:1).
About this color
#688BBD is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.086 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.006 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #688BBD |
| RGB | rgb(104, 139, 189) |
| HSL | hsl(215, 39%, 57%) |
| OKLCH | oklch(63.1% 0.086 257.3) |
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 #688BBD | 3.49:1 | AA large text | Lc -67.9 | Content text, not long reading |
| Black text on #688BBD | 6.01:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #688BBD text on white | 3.49:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #688BBD text on black | 6.01:1 | AA | Lc -39.3 | 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
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B0C2DC
oklch(80.9% 0.042 257.5)
-
Step 400
400
#86A2CB
oklch(70.6% 0.068 257.8)
-
Step 500
500 (this color)
#688BBD
oklch(63.1% 0.086 257.3)
-
Step 600
600
#4F74A9
oklch(55.5% 0.093 257.4)
-
Step 700
700
#406291
oklch(49.2% 0.086 256.7)
-
Step 800
800
#355076
oklch(42.8% 0.072 257)
-
Step 900
900
#2E425F
oklch(37.6% 0.056 257.6)
-
Step 950
950
#1B2738
oklch(27% 0.036 257.1)
#688BBD 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) | #788EBF | 0.023 |
| Deuteranopia (no green cones) | #6E86BC | 0.015 |
| Tritanopia (no blue cones) | #47969C | 0.076 |
| Achromatopsia (no color) | #898989 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688BBD
#688BBD
oklch(63.1% 0.086 257.3)
- #A6834B
#A6834B
oklch(63.1% 0.085 78)
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 #688BBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.006
- Dusty Blue #5A86AD ΔE 0.032
- Off Blue #5684AE ΔE 0.037
- Silver Lake Blue #778DA9 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.042
- Blue Grey #758DA3 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.049
- Light Slate Gray #778899 ΔE 0.055
Use #688BBD 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.