#677CAB
Closest named color: Off Blue (#5684AE). oklch(58.9% 0.077 265.6), rgb(103, 124, 171).
Aa
Black text reads best on this color (5.04:1).
About this color
#677CAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.077 and its hue 266°. 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 (0.077) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #677CAB |
| RGB | rgb(103, 124, 171) |
| HSL | hsl(221, 29%, 54%) |
| OKLCH | oklch(58.9% 0.077 265.6) |
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 #677CAB | 4.16:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #677CAB | 5.04:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #677CAB text on white | 4.16:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #677CAB text on black | 5.04:1 | 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
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B6C1D8
oklch(81% 0.035 265.2)
-
Step 400
400
#90A0C4
oklch(70.6% 0.056 266.2)
-
Step 500
500
#7589B5
oklch(63.1% 0.071 265.5)
-
Step 600
600 (this color)
#677CAB
oklch(58.9% 0.077 265.6)
-
Step 700
700
#4D608A
oklch(49.2% 0.072 265.2)
-
Step 800
800
#3F4E70
oklch(42.6% 0.06 265.7)
-
Step 900
900
#36415A
oklch(37.7% 0.045 265.9)
-
Step 950
950
#202635
oklch(27% 0.029 267.5)
#677CAB 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) | #6C80AD | 0.014 |
| Deuteranopia (no green cones) | #6579AA | 0.009 |
| Tritanopia (no blue cones) | #51868C | 0.070 |
| Achromatopsia (no color) | #7C7C7C | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677CAB
#677CAB
oklch(58.9% 0.077 265.6)
- #917A45
#917A45
oklch(58.9% 0.077 86.6)
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 #677CAB, 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
- Steel Blue #4682B4 ΔE 0.038
- Stormy Blue #507B9C ΔE 0.038
- Cool Blue #4984B8 ΔE 0.038
- Lavender Gray #7E7F9A ΔE 0.043
- Faded Blue #658CBB ΔE 0.045
- Cerulean #457B9D ΔE 0.047
Use #677CAB 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.