#677BBD
Closest named color: Cool Blue (#4984B8). oklch(59.5% 0.104 270.2), rgb(103, 123, 189).
Aa
Black text reads best on this color (5.14:1).
About this color
#677BBD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.104 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.041 away. Black text reads best on it, at 5.14:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.14:1 |
| White text | 4.08:1 |
Values
| HEX | #677BBD |
| RGB | rgb(103, 123, 189) |
| HSL | hsl(226, 39%, 57%) |
| OKLCH | oklch(59.5% 0.104 270.2) |
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 #677BBD | 4.08:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #677BBD | 5.14:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #677BBD text on white | 4.08:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #677BBD text on black | 5.14:1 | AA | Lc -33.7 | 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 500.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B4C0E2
oklch(81% 0.05 269.9)
-
Step 400
400
#8D9ED4
oklch(70.6% 0.082 270.7)
-
Step 500
500 (this color)
#677BBD
oklch(59.5% 0.104 270.2)
-
Step 600
600
#5A6EB5
oklch(55.5% 0.113 270.5)
-
Step 700
700
#4A5C9C
oklch(49.1% 0.105 270.3)
-
Step 800
800
#3D4B7F
oklch(42.6% 0.088 270.9)
-
Step 900
900
#343F66
oklch(37.7% 0.069 270.9)
-
Step 950
950
#1E253C
oklch(27% 0.044 270.3)
#677BBD 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) | #6382C0 | 0.019 |
| Deuteranopia (no green cones) | #5B7ABC | 0.016 |
| Tritanopia (no blue cones) | #488993 | 0.094 |
| Achromatopsia (no color) | #7E7E7E | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677BBD
#677BBD
oklch(59.5% 0.104 270.2)
- #977C2A
#977C2A
oklch(59.6% 0.104 90.3)
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 #677BBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.041
- Off Blue #5684AE ΔE 0.043
- Steel Blue #4682B4 ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.047
- Faded Blue #658CBB ΔE 0.048
- Windows Blue #3778BF ΔE 0.053
- Stormy Blue #507B9C ΔE 0.061
- Flat Blue #3C73A8 ΔE 0.065
Use #677BBD 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.