#687BB1
Closest named color: Off Blue (#5684AE). oklch(59% 0.086 268.8), rgb(104, 123, 177).
Aa
Black text reads best on this color (5.05:1).
About this color
#687BB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.086 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.033 away. Black text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #687BB1 |
| RGB | rgb(104, 123, 177) |
| HSL | hsl(224, 32%, 55%) |
| OKLCH | oklch(59% 0.086 268.8) |
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 #687BB1 | 4.15:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #687BB1 | 5.05:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #687BB1 text on white | 4.15:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #687BB1 text on black | 5.05:1 | AA | Lc -33.1 | 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 600.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D3D9E8
oklch(88.5% 0.022 268.4)
-
Step 300
300
#B6C0DA
oklch(80.8% 0.038 268.8)
-
Step 400
400
#90A0C8
oklch(70.7% 0.061 267.8)
-
Step 500
500
#7688BA
oklch(63.2% 0.079 268.8)
-
Step 600
600 (this color)
#687BB1
oklch(59% 0.086 268.8)
-
Step 700
700
#4E5E8E
oklch(49% 0.08 269.3)
-
Step 800
800
#404D74
oklch(42.7% 0.067 269.4)
-
Step 900
900
#36405D
oklch(37.6% 0.052 269.2)
-
Step 950
950
#202637
oklch(27.1% 0.033 269.2)
#687BB1 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) | #6880B3 | 0.014 |
| Deuteranopia (no green cones) | #6279B0 | 0.010 |
| Tritanopia (no blue cones) | #50868E | 0.077 |
| Achromatopsia (no color) | #7C7C7C | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #687BB1
#687BB1
oklch(59% 0.086 268.8)
- #927B3D
#927B3D
oklch(59.1% 0.086 89.3)
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 #687BB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.036
- Cool Blue #4984B8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.039
- Faded Blue #658CBB ΔE 0.046
- Stormy Blue #507B9C ΔE 0.046
- Lavender Gray #7E7F9A ΔE 0.050
- Cerulean #457B9D ΔE 0.054
Use #687BB1 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.