#617A99
Closest named color: Stormy Blue (#507B9C). oklch(57.2% 0.056 254.1), rgb(97, 122, 153).
Aa
Black text reads best on this color (4.75:1).
About this color
#617A99 is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.056 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.020 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.75:1 |
| White text | 4.41:1 |
Values
| HEX | #617A99 |
| RGB | rgb(97, 122, 153) |
| HSL | hsl(213, 22%, 49%) |
| OKLCH | oklch(57.2% 0.056 254.1) |
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 #617A99 | 4.41:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #617A99 | 4.75:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #617A99 text on white | 4.41:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #617A99 text on black | 4.75:1 | AA | Lc -31.0 | 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
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B6C2D1
oklch(80.9% 0.025 254)
-
Step 400
400
#90A2BA
oklch(70.6% 0.041 255.7)
-
Step 500
500
#748CA9
oklch(63.2% 0.052 253.4)
-
Step 600
600 (this color)
#617A99
oklch(57.2% 0.056 254.1)
-
Step 700
700
#4C627E
oklch(49% 0.053 254.7)
-
Step 800
800
#3F5067
oklch(42.7% 0.044 256.1)
-
Step 900
900
#354353
oklch(37.7% 0.033 252.1)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#617A99 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) | #6F7B9A | 0.019 |
| Deuteranopia (no green cones) | #687598 | 0.016 |
| Tritanopia (no blue cones) | #4F8184 | 0.050 |
| Achromatopsia (no color) | #787878 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617A99
#617A99
oklch(57.2% 0.056 254.1)
- #8C7352
#8C7352
oklch(57.1% 0.057 74)
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 #617A99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.020
- Grey Blue #647D8E ΔE 0.022
- Cerulean #457B9D ΔE 0.031
- Slate Gray #708090 ΔE 0.033
- Dull Blue #49759C ΔE 0.034
- Metallic Blue #4F738E ΔE 0.035
- Battleship Grey #6B7C85 ΔE 0.035
- Off Blue #5684AE ΔE 0.037
Use #617A99 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.