#677ACD
Closest named color: Soft Blue (#6488EA). oklch(60.2% 0.128 272.3), rgb(103, 122, 205).
Aa
Black text reads best on this color (5.24:1).
About this color
#677ACD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.128 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.052 away. Black text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.24:1 |
| White text | 4.00:1 |
Values
| HEX | #677ACD |
| RGB | rgb(103, 122, 205) |
| HSL | hsl(229, 50%, 60%) |
| OKLCH | oklch(60.2% 0.128 272.3) |
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 #677ACD | 4.00:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #677ACD | 5.24:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #677ACD text on white | 4.00:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #677ACD text on black | 5.24:1 | AA | Lc -34.4 | 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
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B2BFEA
oklch(80.9% 0.063 271.8)
-
Step 400
400
#8B9DE0
oklch(70.8% 0.1 272.1)
-
Step 500
500 (this color)
#677ACD
oklch(60.2% 0.128 272.3)
-
Step 600
600
#586BC4
oklch(55.6% 0.139 272.1)
-
Step 700
700
#4859A9
oklch(49.1% 0.129 271.9)
-
Step 800
800
#3B4989
oklch(42.7% 0.107 271.9)
-
Step 900
900
#333D6E
oklch(37.7% 0.085 273)
-
Step 950
950
#1E2440
oklch(27% 0.053 273.2)
#677ACD 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) | #5984D0 | 0.029 |
| Deuteranopia (no green cones) | #4F7BCB | 0.028 |
| Tritanopia (no blue cones) | #3D8C99 | 0.115 |
| Achromatopsia (no color) | #7F7F7F | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677ACD
#677ACD
oklch(60.2% 0.128 272.3)
- #9B7E00
#9B7E00
oklch(60.3% 0.123 92.6)
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 #677ACD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.052
- Cool Blue #4984B8 ΔE 0.057
- Windows Blue #3778BF ΔE 0.057
- Steel Blue #4682B4 ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.062
- Faded Blue #658CBB ΔE 0.062
- Cornflower #6A79F7 ΔE 0.064
- Off Blue #5684AE ΔE 0.064
Use #677ACD 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.