#677FBC
Closest named color: Off Blue (#5684AE). oklch(60.3% 0.098 267.1), rgb(103, 127, 188).
Aa
Black text reads best on this color (5.33:1).
About this color
#677FBC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.098 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.035 away. Black text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #677FBC |
| RGB | rgb(103, 127, 188) |
| HSL | hsl(223, 39%, 57%) |
| OKLCH | oklch(60.3% 0.098 267.1) |
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 #677FBC | 3.93:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #677FBC | 5.33:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #677FBC text on white | 3.93:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #677FBC 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B3C0E0
oklch(80.8% 0.047 267.8)
-
Step 400
400
#8BA0D1
oklch(70.8% 0.076 266.5)
-
Step 500
500 (this color)
#677FBC
oklch(60.3% 0.098 267.1)
-
Step 600
600
#5770B2
oklch(55.5% 0.107 267.2)
-
Step 700
700
#475E99
oklch(49.1% 0.099 266.7)
-
Step 800
800
#3B4D7C
oklch(42.8% 0.082 267.1)
-
Step 900
900
#324064
oklch(37.7% 0.065 267.1)
-
Step 950
950
#1E263A
oklch(27.1% 0.039 267.1)
#677FBC 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) | #6984BF | 0.014 |
| Deuteranopia (no green cones) | #607DBB | 0.011 |
| Tritanopia (no blue cones) | #488C95 | 0.088 |
| Achromatopsia (no color) | #808080 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677FBC
#677FBC
oklch(60.3% 0.098 267.1)
- #9A7D35
#9A7D35
oklch(60.3% 0.097 87.1)
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 #677FBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.035
- Cool Blue #4984B8 ΔE 0.036
- Faded Blue #658CBB ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.038
- Steel Blue #4682B4 ΔE 0.040
- Windows Blue #3778BF ΔE 0.057
- Stormy Blue #507B9C ΔE 0.059
- Lavender Gray #7E7F9A ΔE 0.060
Use #677FBC 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.