#517E97
Closest named color: Stormy Blue (#507B9C). oklch(57% 0.063 233.7), rgb(81, 126, 151).
Aa
Black text reads best on this color (4.78:1).
About this color
#517E97 is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.063 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.014 away. Black text reads best on it, at 4.78:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.78:1 |
| White text | 4.39:1 |
Values
| HEX | #517E97 |
| RGB | rgb(81, 126, 151) |
| HSL | hsl(201, 30%, 45%) |
| OKLCH | oklch(57% 0.063 233.7) |
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 #517E97 | 4.39:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #517E97 | 4.78:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #517E97 text on white | 4.39:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #517E97 text on black | 4.78:1 | AA | Lc -31.3 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D0
oklch(80.9% 0.028 234.1)
-
Step 400
400
#85A6B9
oklch(70.7% 0.046 233.5)
-
Step 500
500
#6690A7
oklch(63.1% 0.058 232.8)
-
Step 600
600 (this color)
#517E97
oklch(57% 0.063 233.7)
-
Step 700
700
#3E667D
oklch(49% 0.058 234.9)
-
Step 800
800
#335465
oklch(42.8% 0.048 231.9)
-
Step 900
900
#2D4553
oklch(37.7% 0.038 234.8)
-
Step 950
950
#1B2930
oklch(27.1% 0.023 230.3)
#517E97 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) | #727D98 | 0.041 |
| Deuteranopia (no green cones) | #687597 | 0.036 |
| Tritanopia (no blue cones) | #328586 | 0.048 |
| Achromatopsia (no color) | #787878 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #517E97
#517E97
oklch(57% 0.063 233.7)
- #956E54
#956E54
oklch(57.1% 0.063 54.8)
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 #517E97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.014
- Cerulean #457B9D ΔE 0.019
- Grey Blue #647D8E ΔE 0.025
- Dull Blue #49759C ΔE 0.032
- Metallic Blue #4F738E ΔE 0.033
- Off Blue #5684AE ΔE 0.037
- Battleship Grey #6B7C85 ΔE 0.039
- Dusty Blue #5A86AD ΔE 0.039
Use #517E97 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.