#637392
Closest named color: Metallic Blue (#4F738E). oklch(55.4% 0.052 263.4), rgb(99, 115, 146).
Aa
White text reads best on this color (4.77:1).
About this color
#637392 is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.052 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.027 away. White text reads best on it, at 4.77:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.39:1 |
| White text | 4.77:1 |
Values
| HEX | #637392 |
| RGB | rgb(99, 115, 146) |
| HSL | hsl(220, 19%, 48%) |
| OKLCH | oklch(55.4% 0.052 263.4) |
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 #637392 | 4.77:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #637392 | 4.39:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #637392 text on white | 4.77:1 | AA | Lc 73.1 | Content text, not long reading |
| #637392 text on black | 4.39:1 | AA large text | Lc -28.6 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D5D9E2
oklch(88.5% 0.013 266.7)
-
Step 300
300
#B9C1D0
oklch(80.9% 0.023 263.2)
-
Step 400
400
#95A1B9
oklch(70.8% 0.038 264.3)
-
Step 500
500
#7A8AA7
oklch(63.1% 0.048 262.3)
-
Step 600
600 (this color)
#637392
oklch(55.4% 0.052 263.4)
-
Step 700
700
#52617D
oklch(49.1% 0.049 262.7)
-
Step 800
800
#444F65
oklch(42.7% 0.039 264)
-
Step 900
900
#394253
oklch(37.8% 0.032 263)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#637392 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) | #697593 | 0.011 |
| Deuteranopia (no green cones) | #647191 | 0.006 |
| Tritanopia (no blue cones) | #56797D | 0.046 |
| Achromatopsia (no color) | #737373 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637392
#637392
oklch(55.4% 0.052 263.4)
- #82704F
#82704F
oklch(55.4% 0.053 82.3)
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 #637392, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.027
- Stormy Blue #507B9C ΔE 0.030
- Grey Blue #647D8E ΔE 0.032
- Dull Blue #49759C ΔE 0.033
- Battleship Gray #6C757D ΔE 0.037
- Cerulean #457B9D ΔE 0.039
- Battleship Grey #6B7C85 ΔE 0.040
- Slate Gray #708090 ΔE 0.045
Use #637392 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.