#617591
Closest named color: Metallic Blue (#4F738E). oklch(55.7% 0.05 256.8), rgb(97, 117, 145).
Aa
White text reads best on this color (4.70:1).
About this color
#617591 is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.050 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.025 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #617591 |
| RGB | rgb(97, 117, 145) |
| HSL | hsl(215, 20%, 47%) |
| OKLCH | oklch(55.7% 0.05 256.8) |
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 #617591 | 4.70:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #617591 | 4.46:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #617591 text on white | 4.70:1 | AA | Lc 72.7 | Content text, not long reading |
| #617591 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4DAE1
oklch(88.6% 0.012 252.1)
-
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
#788BA6
oklch(63.1% 0.046 257.2)
-
Step 600
600 (this color)
#617591
oklch(55.7% 0.05 256.8)
-
Step 700
700
#50627B
oklch(49.1% 0.046 256.7)
-
Step 800
800
#425064
oklch(42.7% 0.038 257.3)
-
Step 900
900
#374252
oklch(37.6% 0.031 257.7)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#617591 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) | #6B7692 | 0.014 |
| Deuteranopia (no green cones) | #667190 | 0.012 |
| Tritanopia (no blue cones) | #537B7E | 0.044 |
| Achromatopsia (no color) | #747474 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617591
#617591
oklch(55.7% 0.05 256.8)
- #847053
#847053
oklch(55.7% 0.049 76.7)
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 #617591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.025
- Grey Blue #647D8E ΔE 0.026
- Stormy Blue #507B9C ΔE 0.026
- Dull Blue #49759C ΔE 0.032
- Battleship Gray #6C757D ΔE 0.034
- Cerulean #457B9D ΔE 0.035
- Battleship Grey #6B7C85 ΔE 0.035
- Slate Gray #708090 ΔE 0.041
Use #617591 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.