#617FA3
Closest named color: Off Blue (#5684AE). oklch(58.8% 0.065 253.4), rgb(97, 127, 163).
Aa
Black text reads best on this color (5.07:1).
About this color
#617FA3 is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.065 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.021 away. Black text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.07:1 |
| White text | 4.13:1 |
Values
| HEX | #617FA3 |
| RGB | rgb(97, 127, 163) |
| HSL | hsl(213, 26%, 51%) |
| OKLCH | oklch(58.8% 0.065 253.4) |
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 #617FA3 | 4.13:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #617FA3 | 5.07:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #617FA3 text on white | 4.13:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #617FA3 text on black | 5.07:1 | AA | Lc -33.2 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B4C2D4
oklch(80.9% 0.03 254.7)
-
Step 400
400
#8CA3BE
oklch(70.7% 0.047 252.6)
-
Step 500
500
#708CAE
oklch(63.1% 0.061 253.6)
-
Step 600
600 (this color)
#617FA3
oklch(58.8% 0.065 253.4)
-
Step 700
700
#486383
oklch(49.2% 0.061 253.2)
-
Step 800
800
#3B516A
oklch(42.8% 0.05 252.1)
-
Step 900
900
#334356
oklch(37.7% 0.039 253.1)
-
Step 950
950
#1E2732
oklch(26.9% 0.024 253.7)
#617FA3 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) | #7180A5 | 0.022 |
| Deuteranopia (no green cones) | #6A7AA2 | 0.017 |
| Tritanopia (no blue cones) | #4A878B | 0.057 |
| Achromatopsia (no color) | #7D7D7D | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617FA3
#617FA3
oklch(58.8% 0.065 253.4)
- #947750
#947750
oklch(58.8% 0.065 74.2)
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 #617FA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.021
- Dusty Blue #5A86AD ΔE 0.022
- Stormy Blue #507B9C ΔE 0.026
- Grey Blue #647D8E ΔE 0.032
- Slate Gray #708090 ΔE 0.035
- Steel Blue #4682B4 ΔE 0.036
- Cerulean #457B9D ΔE 0.036
- Cool Blue #4984B8 ΔE 0.038
Use #617FA3 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.