#17477F
Closest named color: Twilight Blue (#0A437A). oklch(39.8% 0.107 254.8), rgb(23, 71, 127).
Aa
White text reads best on this color (9.35:1).
About this color
#17477F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.107 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.017 away. White text reads best on it, at 9.35:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.35:1 |
Values
| HEX | #17477F |
| RGB | rgb(23, 71, 127) |
| HSL | hsl(212, 69%, 29%) |
| OKLCH | oklch(39.8% 0.107 254.8) |
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 #17477F | 9.35:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #17477F | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #17477F text on white | 9.35:1 | AAA | Lc 91.2 | Preferred for body text |
| #17477F text on black | 2.24:1 | Fails | Lc -11.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9EC4F4
oklch(81% 0.08 254.5)
-
Step 400
400
#66A3EF
oklch(70.6% 0.129 254.7)
-
Step 500
500
#388AEA
oklch(63.1% 0.165 254.6)
-
Step 600
600
#0671D8
oklch(55.5% 0.179 254.8)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#024D98
oklch(42.6% 0.139 255)
-
Step 900
900 (this color)
#17477F
oklch(39.8% 0.107 254.8)
-
Step 950
950
#0C2747
oklch(27.1% 0.068 254.6)
#17477F 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) | #2B4C81 | 0.025 |
| Deuteranopia (no green cones) | #18427E | 0.015 |
| Tritanopia (no blue cones) | #00545C | 0.081 |
| Achromatopsia (no color) | #474747 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17477F
#17477F
oklch(39.8% 0.107 254.8)
- #613F00
#613F00
oklch(39.7% 0.084 74.6)
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 #17477F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.017
- Light Navy #155084 ΔE 0.027
- Cobalt #1E488F ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.038
- Dusk Blue #26538D ΔE 0.044
- Marine Blue #01386A ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.062
- Light Navy Blue #2E5A88 ΔE 0.064
Use #17477F 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.