#688FAB
Closest named color: Blue Grey (#758DA3). oklch(63.2% 0.06 240.1), rgb(104, 143, 171).
Aa
Black text reads best on this color (6.10:1).
About this color
#688FAB is a medium-light, muted blue. In OKLCH its lightness is 63%, its chroma 0.060 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.018 away. Black text reads best on it, at 6.10:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 6.10:1 |
| White text | 3.43:1 |
Values
| HEX | #688FAB |
| RGB | rgb(104, 143, 171) |
| HSL | hsl(205, 29%, 54%) |
| OKLCH | oklch(63.2% 0.06 240.1) |
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 #688FAB | 3.43:1 | AA large text | Lc -67.3 | Content text, not long reading |
| Black text on #688FAB | 6.10:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #688FAB text on white | 3.43:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #688FAB text on black | 6.10:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE3
oklch(88.5% 0.016 239.1)
-
Step 300
300
#B0C4D2
oklch(81% 0.029 238.3)
-
Step 400
400
#86A5BC
oklch(70.7% 0.048 240.5)
-
Step 500
500 (this color)
#688FAB
oklch(63.2% 0.06 240.1)
-
Step 600
600
#4F7996
oklch(55.7% 0.065 239.6)
-
Step 700
700
#3F6580
oklch(49% 0.061 240.6)
-
Step 800
800
#345368
oklch(42.7% 0.051 239.2)
-
Step 900
900
#2E4555
oklch(37.8% 0.04 239.5)
-
Step 950
950
#1B2832
oklch(27% 0.026 242)
#688FAB 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) | #838EAC | 0.034 |
| Deuteranopia (no green cones) | #7A87AB | 0.030 |
| Tritanopia (no blue cones) | #509698 | 0.048 |
| Achromatopsia (no color) | #8A8A8A | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688FAB
#688FAB
oklch(63.2% 0.06 240.1)
- #A58165
#A58165
oklch(63.1% 0.06 59.3)
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 #688FAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.018
- Silver Lake Blue #778DA9 ΔE 0.018
- Faded Blue #658CBB ΔE 0.029
- Light Slate Gray #778899 ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.033
- Steel #738595 ΔE 0.037
- Off Blue #5684AE ΔE 0.041
- Lavender Gray #7E7F9A ΔE 0.049
Use #688FAB 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.