#677CAA
Closest named color: Off Blue (#5684AE). oklch(58.8% 0.075 265.3), rgb(103, 124, 170).
Aa
Black text reads best on this color (5.04:1).
About this color
#677CAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.075 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.027 away. Black text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #677CAA |
| RGB | rgb(103, 124, 170) |
| HSL | hsl(221, 28%, 54%) |
| OKLCH | oklch(58.8% 0.075 265.3) |
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 #677CAA | 4.16:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #677CAA | 5.04:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #677CAA text on white | 4.16:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #677CAA text on black | 5.04:1 | AA | Lc -33.0 | 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
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B6C1D7
oklch(80.9% 0.033 264.4)
-
Step 400
400
#90A1C3
oklch(70.8% 0.054 264.1)
-
Step 500
500
#7589B4
oklch(63.1% 0.069 265.1)
-
Step 600
600 (this color)
#677CAA
oklch(58.8% 0.075 265.3)
-
Step 700
700
#4D6089
oklch(49.1% 0.07 264.9)
-
Step 800
800
#404E6F
oklch(42.6% 0.058 266.3)
-
Step 900
900
#36415A
oklch(37.7% 0.045 265.9)
-
Step 950
950
#202635
oklch(27% 0.029 267.5)
#677CAA 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) | #6C7FAC | 0.011 |
| Deuteranopia (no green cones) | #6679A9 | 0.009 |
| Tritanopia (no blue cones) | #51858C | 0.067 |
| Achromatopsia (no color) | #7C7C7C | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677CAA
#677CAA
oklch(58.8% 0.075 265.3)
- #917946
#917946
oklch(58.7% 0.075 84.9)
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 #677CAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.027
- Dusty Blue #5A86AD ΔE 0.030
- Stormy Blue #507B9C ΔE 0.037
- Steel Blue #4682B4 ΔE 0.038
- Cool Blue #4984B8 ΔE 0.039
- Lavender Gray #7E7F9A ΔE 0.042
- Grey Blue #647D8E ΔE 0.046
- Faded Blue #658CBB ΔE 0.046
Use #677CAA 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.