#17427B
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.108 256.8), rgb(23, 66, 123).
Aa
White text reads best on this color (9.99:1).
About this color
#17427B is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.108 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.008 away. White text reads best on it, at 9.99:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.10:1 |
| White text | 9.99:1 |
Values
| HEX | #17427B |
| RGB | rgb(23, 66, 123) |
| HSL | hsl(214, 68%, 29%) |
| OKLCH | oklch(38.3% 0.108 256.8) |
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 #17427B | 9.99:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #17427B | 2.10:1 | Fails | Lc 11.1 | Not readable |
| #17427B text on white | 9.99:1 | AAA | Lc 92.8 | Preferred for body text |
| #17427B text on black | 2.10:1 | Fails | Lc -9.6 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#9FC3F5
oklch(80.9% 0.081 256.7)
-
Step 400
400
#6AA2F0
oklch(70.7% 0.129 256.9)
-
Step 500
500
#3F88EB
oklch(63% 0.166 256.9)
-
Step 600
600
#1A70D9
oklch(55.6% 0.179 256.7)
-
Step 700
700
#0A5DBD
oklch(49.2% 0.167 256.9)
-
Step 800
800
#0E4C98
oklch(42.6% 0.138 256.8)
-
Step 900
900 (this color)
#17427B
oklch(38.3% 0.108 256.8)
-
Step 950
950
#0E2647
oklch(27% 0.068 257.1)
#17427B 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) | #25477D | 0.021 |
| Deuteranopia (no green cones) | #0F3E7A | 0.014 |
| Tritanopia (no blue cones) | #005058 | 0.084 |
| Achromatopsia (no color) | #424242 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17427B
#17427B
oklch(38.3% 0.108 256.8)
- #5B3C00
#5B3C00
oklch(38.2% 0.08 76.2)
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 #17427B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.008
- Cobalt #1E488F ΔE 0.037
- Light Navy #155084 ΔE 0.042
- Marine Blue #01386A ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.053
- Dusk Blue #26538D ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.068
Use #17427B 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.