#687CB3
Closest named color: Off Blue (#5684AE). oklch(59.3% 0.088 268.4), rgb(104, 124, 179).
Aa
Black text reads best on this color (5.12:1).
About this color
#687CB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.088 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.032 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #687CB3 |
| RGB | rgb(104, 124, 179) |
| HSL | hsl(224, 33%, 55%) |
| OKLCH | oklch(59.3% 0.088 268.4) |
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 #687CB3 | 4.09:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #687CB3 | 5.12:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #687CB3 text on white | 4.09:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #687CB3 text on black | 5.12:1 | AA | Lc -33.6 | 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 600.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D3D9E8
oklch(88.5% 0.022 268.4)
-
Step 300
300
#B6C0DB
oklch(80.9% 0.04 269.4)
-
Step 400
400
#90A0C9
oklch(70.8% 0.063 268.1)
-
Step 500
500
#7588BB
oklch(63.2% 0.08 268.3)
-
Step 600
600 (this color)
#687CB3
oklch(59.3% 0.088 268.4)
-
Step 700
700
#4D5E8F
oklch(49% 0.082 268.7)
-
Step 800
800
#3F4D74
oklch(42.6% 0.068 268.4)
-
Step 900
900
#36405E
oklch(37.6% 0.053 269.6)
-
Step 950
950
#1F2637
oklch(27% 0.033 266.9)
#687CB3 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) | #6981B5 | 0.014 |
| Deuteranopia (no green cones) | #627AB2 | 0.010 |
| Tritanopia (no blue cones) | #4F8790 | 0.078 |
| Achromatopsia (no color) | #7D7D7D | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #687CB3
#687CB3
oklch(59.3% 0.088 268.4)
- #947B3C
#947B3C
oklch(59.3% 0.088 87.9)
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 #687CB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.035
- Cool Blue #4984B8 ΔE 0.037
- Steel Blue #4682B4 ΔE 0.039
- Faded Blue #658CBB ΔE 0.043
- Stormy Blue #507B9C ΔE 0.048
- Lavender Gray #7E7F9A ΔE 0.051
- Cerulean #457B9D ΔE 0.056
Use #687CB3 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.