#677CCC
Closest named color: Soft Blue (#6488EA). oklch(60.6% 0.124 271.2), rgb(103, 124, 204).
Aa
Black text reads best on this color (5.33:1).
About this color
#677CCC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.124 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.050 away. Black text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #677CCC |
| RGB | rgb(103, 124, 204) |
| HSL | hsl(228, 50%, 60%) |
| OKLCH | oklch(60.6% 0.124 271.2) |
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 #677CCC | 3.93:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #677CCC | 5.33:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #677CCC text on white | 3.93:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #677CCC text on black | 5.33:1 | AA | Lc -35.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F6
oklch(93.5% 0.018 272.3)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B2BFE9
oklch(80.9% 0.061 271.5)
-
Step 400
400
#8A9DDE
oklch(70.7% 0.098 271.2)
-
Step 500
500 (this color)
#677CCC
oklch(60.6% 0.124 271.2)
-
Step 600
600
#576CC2
oklch(55.6% 0.135 271.1)
-
Step 700
700
#475AA7
oklch(49.1% 0.125 270.8)
-
Step 800
800
#3B4A87
oklch(42.8% 0.103 271.1)
-
Step 900
900
#323E6C
oklch(37.7% 0.08 271.1)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#677CCC 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) | #5D85CF | 0.025 |
| Deuteranopia (no green cones) | #537CCA | 0.024 |
| Tritanopia (no blue cones) | #3D8D9A | 0.111 |
| Achromatopsia (no color) | #808080 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677CCC
#677CCC
oklch(60.6% 0.124 271.2)
- #9D7E00
#9D7E00
oklch(60.5% 0.124 91.4)
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 #677CCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.050
- Cool Blue #4984B8 ΔE 0.053
- Faded Blue #658CBB ΔE 0.057
- Windows Blue #3778BF ΔE 0.058
- Steel Blue #4682B4 ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.059
- Off Blue #5684AE ΔE 0.060
- Dusty Blue #5A86AD ΔE 0.063
Use #677CCC 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.