#637692
Closest named color: Grey Blue (#647D8E). oklch(56.1% 0.049 258), rgb(99, 118, 146).
Aa
White text reads best on this color (4.62:1).
About this color
#637692 is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.049 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. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.53:1 |
| White text | 4.62:1 |
Values
| HEX | #637692 |
| RGB | rgb(99, 118, 146) |
| HSL | hsl(216, 19%, 48%) |
| OKLCH | oklch(56.1% 0.049 258) |
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 #637692 | 4.62:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #637692 | 4.53:1 | AA | Lc 31.9 | Non-text elements, placeholder text |
| #637692 text on white | 4.62:1 | AA | Lc 72.1 | Content text, not long reading |
| #637692 text on black | 4.53:1 | AA | Lc -29.5 | Dividers and decoration only |
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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4D9E1
oklch(88.4% 0.012 259.8)
-
Step 300
300
#B8C1CF
oklch(80.8% 0.022 259.2)
-
Step 400
400
#93A2B7
oklch(70.7% 0.035 256.8)
-
Step 500
500
#798BA5
oklch(63.2% 0.045 257.5)
-
Step 600
600 (this color)
#637692
oklch(56.1% 0.049 258)
-
Step 700
700
#51627B
oklch(49.2% 0.045 257.9)
-
Step 800
800
#425064
oklch(42.7% 0.038 257.3)
-
Step 900
900
#384251
oklch(37.6% 0.029 258.4)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#637692 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) | #6C7793 | 0.013 |
| Deuteranopia (no green cones) | #677391 | 0.009 |
| Tritanopia (no blue cones) | #557C7F | 0.044 |
| Achromatopsia (no color) | #757575 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637692
#637692
oklch(56.1% 0.049 258)
- #857254
#857254
oklch(56.2% 0.049 78.8)
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 #637692, 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 0.026
- Metallic Blue #4F738E ΔE 0.029
- Battleship Grey #6B7C85 ΔE 0.033
- Battleship Gray #6C757D ΔE 0.033
- Dull Blue #49759C ΔE 0.035
- Cerulean #457B9D ΔE 0.036
- Slate Gray #708090 ΔE 0.037
Use #637692 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.