#677ABF
Closest named color: Cool Blue (#4984B8). oklch(59.4% 0.108 271.1), rgb(103, 122, 191).
Aa
Black text reads best on this color (5.11:1).
About this color
#677ABF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.108 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.044 away. Black text reads best on it, at 5.11:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.11:1 |
| White text | 4.10:1 |
Values
| HEX | #677ABF |
| RGB | rgb(103, 122, 191) |
| HSL | hsl(227, 41%, 58%) |
| OKLCH | oklch(59.4% 0.108 271.1) |
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 #677ABF | 4.10:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #677ABF | 5.11:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #677ABF text on white | 4.10:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #677ABF text on black | 5.11:1 | AA | Lc -33.5 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9ED
oklch(88.6% 0.029 270.4)
-
Step 300
300
#B4BFE4
oklch(80.8% 0.054 272.1)
-
Step 400
400
#8D9ED6
oklch(70.7% 0.085 271.1)
-
Step 500
500 (this color)
#677ABF
oklch(59.4% 0.108 271.1)
-
Step 600
600
#5A6EB8
oklch(55.7% 0.117 270.8)
-
Step 700
700
#4A5B9E
oklch(49% 0.109 271.2)
-
Step 800
800
#3D4B80
oklch(42.7% 0.09 271)
-
Step 900
900
#343F67
oklch(37.8% 0.07 271.1)
-
Step 950
950
#1E253C
oklch(27% 0.044 270.3)
#677ABF 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) | #6181C2 | 0.019 |
| Deuteranopia (no green cones) | #587ABD | 0.019 |
| Tritanopia (no blue cones) | #478893 | 0.097 |
| Achromatopsia (no color) | #7D7D7D | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677ABF
#677ABF
oklch(59.4% 0.108 271.1)
- #967C23
#967C23
oklch(59.5% 0.108 91.9)
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 #677ABF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.047
- Off Blue #5684AE ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.051
- Windows Blue #3778BF ΔE 0.052
- Faded Blue #658CBB ΔE 0.052
- Stormy Blue #507B9C ΔE 0.064
- Flat Blue #3C73A8 ΔE 0.066
Use #677ABF 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.