#677EA4
Closest named color: Off Blue (#5684AE). oklch(59% 0.064 260.3), rgb(103, 126, 164).
Aa
Black text reads best on this color (5.09:1).
About this color
#677EA4 is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.064 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.025 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #677EA4 |
| RGB | rgb(103, 126, 164) |
| HSL | hsl(217, 25%, 52%) |
| OKLCH | oklch(59% 0.064 260.3) |
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 #677EA4 | 4.11:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #677EA4 | 5.09:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #677EA4 text on white | 4.11:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #677EA4 text on black | 5.09:1 | AA | Lc -33.4 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E4
oklch(88.4% 0.016 262.7)
-
Step 300
300
#B6C1D4
oklch(80.8% 0.029 261.5)
-
Step 400
400
#90A2BE
oklch(70.8% 0.046 259.2)
-
Step 500
500
#758AAE
oklch(63% 0.06 261.1)
-
Step 600
600 (this color)
#677EA4
oklch(59% 0.064 260.3)
-
Step 700
700
#4D6183
oklch(49% 0.06 260.8)
-
Step 800
800
#3F4F6A
oklch(42.6% 0.05 260.7)
-
Step 900
900
#364256
oklch(37.7% 0.038 260.5)
-
Step 950
950
#202733
oklch(27.1% 0.025 261.1)
#677EA4 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) | #7180A6 | 0.015 |
| Deuteranopia (no green cones) | #6A7AA3 | 0.011 |
| Tritanopia (no blue cones) | #54868B | 0.057 |
| Achromatopsia (no color) | #7D7D7D | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677EA4
#677EA4
oklch(59% 0.064 260.3)
- #917950
#917950
oklch(58.9% 0.064 80.4)
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 #677EA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.025
- Dusty Blue #5A86AD ΔE 0.026
- Stormy Blue #507B9C ΔE 0.033
- Grey Blue #647D8E ΔE 0.035
- Slate Gray #708090 ΔE 0.035
- Lavender Gray #7E7F9A ΔE 0.035
- Steel #738595 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.040
Use #677EA4 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.