#677DBF
Closest named color: Cool Blue (#4984B8). oklch(60.1% 0.104 269.1), rgb(103, 125, 191).
Aa
Black text reads best on this color (5.26:1).
About this color
#677DBF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.104 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.040 away. Black text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.26:1 |
| White text | 3.99:1 |
Values
| HEX | #677DBF |
| RGB | rgb(103, 125, 191) |
| HSL | hsl(225, 41%, 58%) |
| OKLCH | oklch(60.1% 0.104 269.1) |
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 #677DBF | 3.99:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #677DBF | 5.26:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #677DBF text on white | 3.99:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #677DBF text on black | 5.26:1 | AA | Lc -34.5 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D1D9ED
oklch(88.5% 0.029 268.3)
-
Step 300
300
#B3C0E3
oklch(80.9% 0.052 269.2)
-
Step 400
400
#8C9FD4
oklch(70.8% 0.081 269)
-
Step 500
500 (this color)
#677DBF
oklch(60.1% 0.104 269.1)
-
Step 600
600
#586FB6
oklch(55.6% 0.114 268.9)
-
Step 700
700
#485C9C
oklch(48.9% 0.106 269.2)
-
Step 800
800
#3B4C7F
oklch(42.7% 0.088 268.6)
-
Step 900
900
#333F66
oklch(37.6% 0.069 269.9)
-
Step 950
950
#1E253C
oklch(27% 0.044 270.3)
#677DBF 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) | #6583C2 | 0.016 |
| Deuteranopia (no green cones) | #5C7CBE | 0.014 |
| Tritanopia (no blue cones) | #468B95 | 0.094 |
| Achromatopsia (no color) | #7F7F7F | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677DBF
#677DBF
oklch(60.1% 0.104 269.1)
- #997D2B
#997D2B
oklch(60.1% 0.104 89.6)
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 #677DBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.040
- Off Blue #5684AE ΔE 0.042
- Steel Blue #4682B4 ΔE 0.043
- Faded Blue #658CBB ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.045
- Windows Blue #3778BF ΔE 0.054
- Stormy Blue #507B9C ΔE 0.063
- Lavender Gray #7E7F9A ΔE 0.066
Use #677DBF 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.