#677DCB
Closest named color: Soft Blue (#6488EA). oklch(60.7% 0.121 270.5), rgb(103, 125, 203).
Aa
Black text reads best on this color (5.37:1).
About this color
#677DCB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.121 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 5.37:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.37:1 |
| White text | 3.90:1 |
Values
| HEX | #677DCB |
| RGB | rgb(103, 125, 203) |
| HSL | hsl(227, 49%, 60%) |
| OKLCH | oklch(60.7% 0.121 270.5) |
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 #677DCB | 3.90:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #677DCB | 5.37:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #677DCB text on white | 3.90:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #677DCB text on black | 5.37:1 | AA | Lc -35.3 | 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
#D1D9F0
oklch(88.6% 0.033 270.4)
-
Step 300
300
#B2BFE8
oklch(80.8% 0.06 271.2)
-
Step 400
400
#8A9EDC
oklch(70.8% 0.094 270.2)
-
Step 500
500 (this color)
#677DCB
oklch(60.7% 0.121 270.5)
-
Step 600
600
#576CC0
oklch(55.5% 0.132 271)
-
Step 700
700
#475AA6
oklch(49.1% 0.123 270.7)
-
Step 800
800
#3A4A86
oklch(42.7% 0.101 270.4)
-
Step 900
900
#323E6C
oklch(37.7% 0.08 271.1)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#677DCB 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) | #5F85CE | 0.022 |
| Deuteranopia (no green cones) | #557DC9 | 0.022 |
| Tritanopia (no blue cones) | #3E8D9A | 0.108 |
| Achromatopsia (no color) | #818181 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677DCB
#677DCB
oklch(60.7% 0.121 270.5)
- #9E7E0B
#9E7E0B
oklch(60.7% 0.121 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 #677DCB, 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 0.051
- Faded Blue #658CBB ΔE 0.053
- Steel Blue #4682B4 ΔE 0.056
- Off Blue #5684AE ΔE 0.057
- Windows Blue #3778BF ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.058
- Dusty Blue #5A86AD ΔE 0.060
Use #677DCB 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.