#617D9F
Closest named color: Stormy Blue (#507B9C). oklch(58.1% 0.062 253.6), rgb(97, 125, 159).
Aa
Black text reads best on this color (4.94:1).
About this color
#617D9F is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.062 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.022 away. Black text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #617D9F |
| RGB | rgb(97, 125, 159) |
| HSL | hsl(213, 24%, 50%) |
| OKLCH | oklch(58.1% 0.062 253.6) |
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 #617D9F | 4.24:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #617D9F | 4.94:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #617D9F text on white | 4.24:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #617D9F text on black | 4.94:1 | AA | Lc -32.3 | 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
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B5C2D3
oklch(80.9% 0.028 255.1)
-
Step 400
400
#8EA3BC
oklch(70.8% 0.044 252.9)
-
Step 500
500
#728CAC
oklch(63.2% 0.057 253.9)
-
Step 600
600 (this color)
#617D9F
oklch(58.1% 0.062 253.6)
-
Step 700
700
#4A6381
oklch(49.2% 0.057 253.4)
-
Step 800
800
#3D5169
oklch(42.8% 0.047 253.4)
-
Step 900
900
#344355
oklch(37.7% 0.037 253.3)
-
Step 950
950
#1E2732
oklch(26.9% 0.024 253.7)
#617D9F 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) | #707EA1 | 0.021 |
| Deuteranopia (no green cones) | #69789E | 0.016 |
| Tritanopia (no blue cones) | #4C8588 | 0.055 |
| Achromatopsia (no color) | #7B7B7B | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617D9F
#617D9F
oklch(58.1% 0.062 253.6)
- #917551
#917551
oklch(58% 0.062 73.1)
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 #617D9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.022
- Grey Blue #647D8E ΔE 0.027
- Off Blue #5684AE ΔE 0.027
- Dusty Blue #5A86AD ΔE 0.029
- Cerulean #457B9D ΔE 0.033
- Slate Gray #708090 ΔE 0.033
- Dull Blue #49759C ΔE 0.039
- Steel Blue #4682B4 ΔE 0.040
Use #617D9F 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.