#677FD9
Closest named color: Soft Blue (#6488EA). oklch(61.9% 0.139 270.7), rgb(103, 127, 217).
Aa
Black text reads best on this color (5.61:1).
About this color
#677FD9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.139 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.031 away. Black text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.61:1 |
| White text | 3.74:1 |
Values
| HEX | #677FD9 |
| RGB | rgb(103, 127, 217) |
| HSL | hsl(227, 60%, 63%) |
| OKLCH | oklch(61.9% 0.139 270.7) |
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 #677FD9 | 3.74:1 | AA large text | Lc -70.3 | Content text, not long reading |
| Black text on #677FD9 | 5.61:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #677FD9 text on white | 3.74:1 | AA large text | Lc 64.8 | Content text, not long reading |
| #677FD9 text on black | 5.61:1 | AA | Lc -36.9 | 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 500.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5EAF8
oklch(93.7% 0.02 270.2)
-
Step 200
200
#CFD8F3
oklch(88.4% 0.038 271)
-
Step 300
300
#B0BFED
oklch(80.9% 0.067 270.7)
-
Step 400
400
#879DE5
oklch(70.8% 0.109 270.5)
-
Step 500
500 (this color)
#677FD9
oklch(61.9% 0.139 270.7)
-
Step 600
600
#536ACB
oklch(55.6% 0.152 270.7)
-
Step 700
700
#4458AF
oklch(49.1% 0.14 270.7)
-
Step 800
800
#38488E
oklch(42.6% 0.117 271)
-
Step 900
900
#303D71
oklch(37.6% 0.09 271)
-
Step 950
950
#1C2442
oklch(26.9% 0.057 270.9)
#677FD9 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) | #5A89DC | 0.028 |
| Deuteranopia (no green cones) | #4D7FD7 | 0.029 |
| Tritanopia (no blue cones) | #3092A1 | 0.124 |
| Achromatopsia (no color) | #848484 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677FD9
#677FD9
oklch(61.9% 0.139 270.7)
- #A38200
#A38200
oklch(62% 0.127 90.8)
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 #677FD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.048
- Cornflower #6A79F7 ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.060
- Chefchaouen Blue #4895EF ΔE 0.063
- Faded Blue #658CBB ΔE 0.065
- Cool Blue #4984B8 ΔE 0.066
- Windows Blue #3778BF ΔE 0.069
Use #677FD9 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.