#677FAF
Closest named color: Off Blue (#5684AE). oklch(59.7% 0.079 263.7), rgb(103, 127, 175).
Aa
Black text reads best on this color (5.23:1).
About this color
#677FAF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.079 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.023 away. Black text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.23:1 |
| White text | 4.01:1 |
Values
| HEX | #677FAF |
| RGB | rgb(103, 127, 175) |
| HSL | hsl(220, 31%, 55%) |
| OKLCH | oklch(59.7% 0.079 263.7) |
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 #677FAF | 4.01:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #677FAF | 5.23:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #677FAF text on white | 4.01:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #677FAF text on black | 5.23:1 | AA | Lc -34.3 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B4C1DA
oklch(80.9% 0.038 263.6)
-
Step 400
400
#8DA1C8
oklch(70.7% 0.062 263.6)
-
Step 500
500 (this color)
#677FAF
oklch(59.7% 0.079 263.7)
-
Step 600
600
#5973A6
oklch(55.7% 0.086 263.2)
-
Step 700
700
#49608E
oklch(49.1% 0.079 263.4)
-
Step 800
800
#3C4E73
oklch(42.6% 0.066 264)
-
Step 900
900
#33415D
oklch(37.6% 0.052 263.7)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#677FAF 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) | #6E82B1 | 0.013 |
| Deuteranopia (no green cones) | #677CAE | 0.008 |
| Tritanopia (no blue cones) | #4F8990 | 0.070 |
| Achromatopsia (no color) | #7F7F7F | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677FAF
#677FAF
oklch(59.7% 0.079 263.7)
- #967B46
#967B46
oklch(59.7% 0.079 83.1)
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 #677FAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.025
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.036
- Faded Blue #658CBB ΔE 0.036
- Stormy Blue #507B9C ΔE 0.043
- Lavender Gray #7E7F9A ΔE 0.044
- Slate Gray #708090 ΔE 0.050
Use #677FAF 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.