#677BAF
Closest named color: Off Blue (#5684AE). oklch(58.8% 0.084 267.7), rgb(103, 123, 175).
Aa
Black text reads best on this color (5.02:1).
About this color
#677BAF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.084 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.031 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #677BAF |
| RGB | rgb(103, 123, 175) |
| HSL | hsl(223, 31%, 55%) |
| OKLCH | oklch(58.8% 0.084 267.7) |
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 #677BAF | 4.17:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #677BAF | 5.02:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #677BAF text on white | 4.17:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #677BAF text on black | 5.02:1 | AA | Lc -32.9 | 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
#D3D9E7
oklch(88.5% 0.02 267.3)
-
Step 300
300
#B6C0DA
oklch(80.8% 0.038 268.8)
-
Step 400
400
#90A0C7
oklch(70.7% 0.06 267.4)
-
Step 500
500
#7588B9
oklch(63.1% 0.077 267.8)
-
Step 600
600 (this color)
#677BAF
oklch(58.8% 0.084 267.7)
-
Step 700
700
#4D5F8D
oklch(49.1% 0.077 267.2)
-
Step 800
800
#3F4E73
oklch(42.8% 0.065 266.8)
-
Step 900
900
#36415D
oklch(37.8% 0.05 267.5)
-
Step 950
950
#202636
oklch(27% 0.031 268.4)
#677BAF 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) | #697FB1 | 0.012 |
| Deuteranopia (no green cones) | #6279AE | 0.009 |
| Tritanopia (no blue cones) | #4F868D | 0.076 |
| Achromatopsia (no color) | #7C7C7C | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677BAF
#677BAF
oklch(58.8% 0.084 267.7)
- #927A3F
#927A3F
oklch(58.9% 0.083 87.6)
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 #677BAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.034
- Cool Blue #4984B8 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.038
- Stormy Blue #507B9C ΔE 0.043
- Faded Blue #658CBB ΔE 0.047
- Lavender Gray #7E7F9A ΔE 0.049
- Cerulean #457B9D ΔE 0.051
Use #677BAF 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.