#617BB5
Closest named color: Off Blue (#5684AE). oklch(58.7% 0.095 265.2), rgb(97, 123, 181).
Aa
Black text reads best on this color (5.00:1).
About this color
#617BB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.095 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.032 away. Black text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #617BB5 |
| RGB | rgb(97, 123, 181) |
| HSL | hsl(221, 36%, 55%) |
| OKLCH | oklch(58.7% 0.095 265.2) |
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 #617BB5 | 4.19:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #617BB5 | 5.00:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #617BB5 text on white | 4.19:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #617BB5 text on black | 5.00:1 | AA | Lc -32.8 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E9
oklch(88.5% 0.023 266.9)
-
Step 300
300
#B3C1DD
oklch(80.9% 0.043 264.3)
-
Step 400
400
#8CA0CC
oklch(70.6% 0.069 265.6)
-
Step 500
500
#7088BF
oklch(63% 0.088 265.8)
-
Step 600
600 (this color)
#617BB5
oklch(58.7% 0.095 265.2)
-
Step 700
700
#485F93
oklch(49.1% 0.088 265.2)
-
Step 800
800
#3B4E77
oklch(42.7% 0.073 264.6)
-
Step 900
900
#334160
oklch(37.7% 0.057 265.2)
-
Step 950
950
#1E2638
oklch(27% 0.036 265.6)
#617BB5 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) | #6680B7 | 0.016 |
| Deuteranopia (no green cones) | #5D78B4 | 0.010 |
| Tritanopia (no blue cones) | #418790 | 0.084 |
| Achromatopsia (no color) | #7C7C7C | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617BB5
#617BB5
oklch(58.7% 0.095 265.2)
- #967833
#967833
oklch(58.8% 0.095 85.5)
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 #617BB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.032
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.037
- Stormy Blue #507B9C ΔE 0.046
- Windows Blue #3778BF ΔE 0.047
- Faded Blue #658CBB ΔE 0.048
- Dull Blue #49759C ΔE 0.052
Use #617BB5 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.