#677AB9
Closest named color: Off Blue (#5684AE). oklch(59.1% 0.099 270.4), rgb(103, 122, 185).
Aa
Black text reads best on this color (5.06:1).
About this color
#677AB9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.099 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.041 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #677AB9 |
| RGB | rgb(103, 122, 185) |
| HSL | hsl(226, 37%, 56%) |
| OKLCH | oklch(59.1% 0.099 270.4) |
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 #677AB9 | 4.14:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #677AB9 | 5.06:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #677AB9 text on white | 4.14:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #677AB9 text on black | 5.06:1 | AA | Lc -33.2 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D3D9EA
oklch(88.6% 0.024 270.3)
-
Step 300
300
#B5C0DE
oklch(80.9% 0.044 269.5)
-
Step 400
400
#8F9FCE
oklch(70.7% 0.071 269.9)
-
Step 500
500
#7487C1
oklch(63.2% 0.09 269.8)
-
Step 600
600 (this color)
#677AB9
oklch(59.1% 0.099 270.4)
-
Step 700
700
#4D5D95
oklch(49.1% 0.092 270.6)
-
Step 800
800
#3F4C79
oklch(42.7% 0.077 270.7)
-
Step 900
900
#354061
oklch(37.7% 0.059 269.4)
-
Step 950
950
#1F2539
oklch(26.9% 0.038 270.9)
#677AB9 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) | #6480BC | 0.016 |
| Deuteranopia (no green cones) | #5C79B8 | 0.015 |
| Tritanopia (no blue cones) | #4A8791 | 0.089 |
| Achromatopsia (no color) | #7C7C7C | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677AB9
#677AB9
oklch(59.1% 0.099 270.4)
- #947B2E
#947B2E
oklch(59.2% 0.1 90.9)
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 #677AB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.041
- Cool Blue #4984B8 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.045
- Faded Blue #658CBB ΔE 0.050
- Windows Blue #3778BF ΔE 0.052
- Stormy Blue #507B9C ΔE 0.056
- Dull Blue #49759C ΔE 0.061
Use #677AB9 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.