#677FCC
Closest named color: Soft Blue (#6488EA). oklch(61.2% 0.12 269.5), rgb(103, 127, 204).
Aa
Black text reads best on this color (5.48:1).
About this color
#677FCC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.120 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.047 away. Black text reads best on it, at 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.48:1 |
| White text | 3.82:1 |
Values
| HEX | #677FCC |
| RGB | rgb(103, 127, 204) |
| HSL | hsl(226, 50%, 60%) |
| OKLCH | oklch(61.2% 0.12 269.5) |
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 #677FCC | 3.82:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #677FCC | 5.48:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #677FCC text on white | 3.82:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #677FCC text on black | 5.48:1 | AA | Lc -36.0 | 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
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B1C0E8
oklch(81% 0.059 268.9)
-
Step 400
400
#899EDC
oklch(70.7% 0.094 269.5)
-
Step 500
500 (this color)
#677FCC
oklch(61.2% 0.12 269.5)
-
Step 600
600
#556DBF
oklch(55.5% 0.13 269.5)
-
Step 700
700
#455BA5
oklch(49.1% 0.121 269.1)
-
Step 800
800
#394A86
oklch(42.6% 0.102 269.8)
-
Step 900
900
#313F6B
oklch(37.8% 0.078 269.1)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#677FCC 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) | #6187CF | 0.021 |
| Deuteranopia (no green cones) | #577ECA | 0.020 |
| Tritanopia (no blue cones) | #3D8F9C | 0.107 |
| Achromatopsia (no color) | #828282 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677FCC
#677FCC
oklch(61.2% 0.12 269.5)
- #A07F12
#A07F12
oklch(61.1% 0.12 89.5)
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 #677FCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.047
- Faded Blue #658CBB ΔE 0.050
- Cool Blue #4984B8 ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.054
- Steel Blue #4682B4 ΔE 0.055
- Off Blue #5684AE ΔE 0.056
- Dusty Blue #5A86AD ΔE 0.059
- Windows Blue #3778BF ΔE 0.060
Use #677FCC 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.