#617BAF
Closest named color: Off Blue (#5684AE). oklch(58.4% 0.086 263.6), rgb(97, 123, 175).
Aa
Black text reads best on this color (4.96:1).
About this color
#617BAF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.086 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.028 away. Black text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #617BAF |
| RGB | rgb(97, 123, 175) |
| HSL | hsl(220, 33%, 53%) |
| OKLCH | oklch(58.4% 0.086 263.6) |
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 #617BAF | 4.23:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #617BAF | 4.96:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #617BAF text on white | 4.23:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #617BAF text on black | 4.96:1 | AA | Lc -32.5 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B4C1DA
oklch(80.9% 0.038 263.6)
-
Step 400
400
#8DA1C8
oklch(70.7% 0.062 263.6)
-
Step 500
500
#7189BA
oklch(63.1% 0.079 264.1)
-
Step 600
600 (this color)
#617BAF
oklch(58.4% 0.086 263.6)
-
Step 700
700
#49608E
oklch(49.1% 0.079 263.4)
-
Step 800
800
#3C4E73
oklch(42.6% 0.066 264)
-
Step 900
900
#33415D
oklch(37.6% 0.052 263.7)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#617BAF 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) | #687FB1 | 0.015 |
| Deuteranopia (no green cones) | #6078AE | 0.009 |
| Tritanopia (no blue cones) | #44868D | 0.078 |
| Achromatopsia (no color) | #7B7B7B | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617BAF
#617BAF
oklch(58.4% 0.086 263.6)
- #94773B
#94773B
oklch(58.4% 0.086 83.7)
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 #617BAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.028
- Steel Blue #4682B4 ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.033
- Cool Blue #4984B8 ΔE 0.033
- Stormy Blue #507B9C ΔE 0.038
- Cerulean #457B9D ΔE 0.044
- Dull Blue #49759C ΔE 0.045
- Faded Blue #658CBB ΔE 0.048
Use #617BAF 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.