#677CB6
Closest named color: Off Blue (#5684AE). oklch(59.4% 0.093 268.3), rgb(103, 124, 182).
Aa
Black text reads best on this color (5.13:1).
About this color
#677CB6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.093 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.034 away. Black text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.13:1 |
| White text | 4.08:1 |
Values
| HEX | #677CB6 |
| RGB | rgb(103, 124, 182) |
| HSL | hsl(224, 35%, 56%) |
| OKLCH | oklch(59.4% 0.093 268.3) |
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 #677CB6 | 4.08:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #677CB6 | 5.13:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #677CB6 text on white | 4.08:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #677CB6 text on black | 5.13:1 | AA | Lc -33.7 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EA
oklch(88.5% 0.025 267.9)
-
Step 300
300
#B4C0DF
oklch(80.9% 0.046 268.6)
-
Step 400
400
#8D9FCF
oklch(70.6% 0.073 268.5)
-
Step 500
500 (this color)
#677CB6
oklch(59.4% 0.093 268.3)
-
Step 600
600
#5A70AE
oklch(55.5% 0.1 268.2)
-
Step 700
700
#4A5E96
oklch(49.2% 0.093 268)
-
Step 800
800
#3D4D7A
oklch(42.8% 0.078 268.2)
-
Step 900
900
#344062
oklch(37.7% 0.061 268.6)
-
Step 950
950
#1E2639
oklch(27% 0.037 266.4)
#677CB6 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) | #6781B8 | 0.014 |
| Deuteranopia (no green cones) | #607AB5 | 0.011 |
| Tritanopia (no blue cones) | #4B8891 | 0.083 |
| Achromatopsia (no color) | #7D7D7D | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677CB6
#677CB6
oklch(59.4% 0.093 268.3)
- #957B37
#957B37
oklch(59.4% 0.093 88.3)
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 #677CB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.034
- Cool Blue #4984B8 ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.037
- Steel Blue #4682B4 ΔE 0.039
- Faded Blue #658CBB ΔE 0.044
- Stormy Blue #507B9C ΔE 0.051
- Windows Blue #3778BF ΔE 0.055
- Lavender Gray #7E7F9A ΔE 0.055
Use #677CB6 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.