#637795
Closest named color: Grey Blue (#647D8E). oklch(56.5% 0.052 258.3), rgb(99, 119, 149).
Aa
Black text reads best on this color (4.60:1).
About this color
#637795 is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.052 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.024 away. Black text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.60:1 |
| White text | 4.56:1 |
Values
| HEX | #637795 |
| RGB | rgb(99, 119, 149) |
| HSL | hsl(216, 20%, 49%) |
| OKLCH | oklch(56.5% 0.052 258.3) |
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 #637795 | 4.56:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #637795 | 4.60:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #637795 text on white | 4.56:1 | AA | Lc 71.7 | Content text, not long reading |
| #637795 text on black | 4.60:1 | AA | Lc -30.0 | 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 600.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4DAE2
oklch(88.6% 0.013 255.5)
-
Step 300
300
#B7C1D0
oklch(80.8% 0.024 258.4)
-
Step 400
400
#92A2B9
oklch(70.7% 0.038 257.4)
-
Step 500
500
#788BA7
oklch(63.2% 0.048 258)
-
Step 600
600 (this color)
#637795
oklch(56.5% 0.052 258.3)
-
Step 700
700
#50627D
oklch(49.2% 0.049 258.3)
-
Step 800
800
#415065
oklch(42.7% 0.04 256.8)
-
Step 900
900
#374252
oklch(37.6% 0.031 257.7)
-
Step 950
950
#202730
oklch(27% 0.02 254.8)
#637795 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) | #6D7896 | 0.014 |
| Deuteranopia (no green cones) | #677494 | 0.009 |
| Tritanopia (no blue cones) | #547D81 | 0.046 |
| Achromatopsia (no color) | #767676 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637795
#637795
oklch(56.5% 0.052 258.3)
- #877253
#877253
oklch(56.4% 0.052 77.1)
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 #637795, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.024
- Stormy Blue #507B9C ΔE 0.024
- Metallic Blue #4F738E ΔE 0.031
- Dull Blue #49759C ΔE 0.034
- Battleship Grey #6B7C85 ΔE 0.035
- Cerulean #457B9D ΔE 0.035
- Slate Gray #708090 ΔE 0.036
- Battleship Gray #6C757D ΔE 0.037
Use #637795 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.