#677ABC
Closest named color: Cool Blue (#4984B8). oklch(59.3% 0.104 270.8), rgb(103, 122, 188).
Aa
Black text reads best on this color (5.08:1).
About this color
#677ABC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.104 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.042 away. Black text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.08:1 |
| White text | 4.12:1 |
Values
| HEX | #677ABC |
| RGB | rgb(103, 122, 188) |
| HSL | hsl(227, 39%, 57%) |
| OKLCH | oklch(59.3% 0.104 270.8) |
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 #677ABC | 4.12:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #677ABC | 5.08:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #677ABC text on white | 4.12:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #677ABC text on black | 5.08:1 | AA | Lc -33.4 | 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 600.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EB
oklch(88.5% 0.026 268.8)
-
Step 300
300
#B5C0E0
oklch(81% 0.047 270.4)
-
Step 400
400
#8F9FD0
oklch(70.8% 0.074 270.4)
-
Step 500
500
#7486C4
oklch(63.1% 0.096 271.1)
-
Step 600
600 (this color)
#677ABC
oklch(59.3% 0.104 270.8)
-
Step 700
700
#4C5D97
oklch(49.1% 0.095 270.2)
-
Step 800
800
#3F4C7B
oklch(42.8% 0.08 271)
-
Step 900
900
#353F63
oklch(37.6% 0.063 271.3)
-
Step 950
950
#1F253A
oklch(26.9% 0.04 271.3)
#677ABC 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) | #6281BF | 0.019 |
| Deuteranopia (no green cones) | #5A79BB | 0.017 |
| Tritanopia (no blue cones) | #488892 | 0.094 |
| Achromatopsia (no color) | #7D7D7D | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677ABC
#677ABC
oklch(59.3% 0.104 270.8)
- #957B29
#957B29
oklch(59.2% 0.104 90.9)
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 #677ABC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.042
- Off Blue #5684AE ΔE 0.044
- Steel Blue #4682B4 ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.048
- Faded Blue #658CBB ΔE 0.051
- Windows Blue #3778BF ΔE 0.052
- Stormy Blue #507B9C ΔE 0.060
- Flat Blue #3C73A8 ΔE 0.063
Use #677ABC 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.