#17497E
Closest named color: Twilight Blue (#0A437A). oklch(40.2% 0.104 253), rgb(23, 73, 126).
Aa
White text reads best on this color (9.16:1).
About this color
#17497E is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.104 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.021 away. White text reads best on it, at 9.16:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #17497E |
| RGB | rgb(23, 73, 126) |
| HSL | hsl(211, 69%, 29%) |
| OKLCH | oklch(40.2% 0.104 253) |
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 #17497E | 9.16:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #17497E | 2.29:1 | Fails | Lc 13.2 | Not readable |
| #17497E text on white | 9.16:1 | AAA | Lc 90.8 | Preferred for body text |
| #17497E text on black | 2.29:1 | Fails | Lc -11.6 | Not readable |
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 900.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF6
oklch(88.4% 0.044 254.8)
-
Step 300
300
#9DC4F2
oklch(80.8% 0.078 252.9)
-
Step 400
400
#66A4EC
oklch(70.7% 0.124 253.2)
-
Step 500
500
#368BE6
oklch(63.1% 0.159 253)
-
Step 600
600
#0073D4
oklch(55.6% 0.172 253.1)
-
Step 700
700
#0060B3
oklch(49% 0.152 253.2)
-
Step 800
800
#004F94
oklch(42.8% 0.131 252.8)
-
Step 900
900 (this color)
#17497E
oklch(40.2% 0.104 253)
-
Step 950
950
#0B2745
oklch(26.9% 0.065 252.8)
#17497E 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) | #2F4D80 | 0.027 |
| Deuteranopia (no green cones) | #1E447D | 0.015 |
| Tritanopia (no blue cones) | #00565D | 0.079 |
| Achromatopsia (no color) | #484848 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17497E
#17497E
oklch(40.2% 0.104 253)
- #643F00
#643F00
oklch(40.1% 0.086 72.1)
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 #17497E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.021
- Light Navy #155084 ΔE 0.022
- Cobalt #1E488F ΔE 0.030
- Deep Sea Blue #015482 ΔE 0.032
- Dusk Blue #26538D ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.059
- Marine Blue #01386A ΔE 0.062
Use #17497E 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.