#657399
Closest named color: Stormy Blue (#507B9C). oklch(55.9% 0.062 268.7), rgb(101, 115, 153).
Aa
White text reads best on this color (4.70:1).
About this color
#657399 is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.062 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.032 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #657399 |
| RGB | rgb(101, 115, 153) |
| HSL | hsl(224, 20%, 50%) |
| OKLCH | oklch(55.9% 0.062 268.7) |
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 #657399 | 4.70:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #657399 | 4.46:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #657399 text on white | 4.70:1 | AA | Lc 72.6 | Content text, not long reading |
| #657399 text on black | 4.46:1 | AA large text | Lc -29.0 | 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
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D5D9E4
oklch(88.5% 0.016 270)
-
Step 300
300
#B9C0D3
oklch(80.8% 0.028 269.6)
-
Step 400
400
#95A0BD
oklch(70.7% 0.044 268.9)
-
Step 500
500
#7B89AD
oklch(63.2% 0.057 268.2)
-
Step 600
600 (this color)
#657399
oklch(55.9% 0.062 268.7)
-
Step 700
700
#536082
oklch(49.2% 0.057 268.1)
-
Step 800
800
#444E69
oklch(42.6% 0.047 268.6)
-
Step 900
900
#394156
oklch(37.7% 0.038 268.4)
-
Step 950
950
#222632
oklch(27% 0.023 270.4)
#657399 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) | #67769B | 0.009 |
| Deuteranopia (no green cones) | #627298 | 0.005 |
| Tritanopia (no blue cones) | #567B80 | 0.056 |
| Achromatopsia (no color) | #747474 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657399
#657399
oklch(55.9% 0.062 268.7)
- #837349
#837349
oklch(56% 0.062 89.4)
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 #657399, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.032
- Dull Blue #49759C ΔE 0.034
- Metallic Blue #4F738E ΔE 0.035
- Grey Blue #647D8E ΔE 0.038
- Cerulean #457B9D ΔE 0.040
- Grey Purple #826D8C ΔE 0.046
- Battleship Gray #6C757D ΔE 0.047
- Battleship Grey #6B7C85 ΔE 0.048
Use #657399 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.