#17384F
Closest named color: Dark Blue Grey (#1F3B4D). oklch(32.8% 0.056 241.7), rgb(23, 56, 79).
Aa
White text reads best on this color (12.24:1).
About this color
#17384F is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.056 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.015 away. White text reads best on it, at 12.24:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.71:1 |
| White text | 12.24:1 |
Values
| HEX | #17384F |
| RGB | rgb(23, 56, 79) |
| HSL | hsl(205, 55%, 20%) |
| OKLCH | oklch(32.8% 0.056 241.7) |
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 #17384F | 12.24:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #17384F | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #17384F text on white | 12.24:1 | AAA | Lc 97.8 | Preferred for body text |
| #17384F text on black | 1.71:1 | Fails | Lc 0.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDBE8
oklch(88.4% 0.024 244.2)
-
Step 300
300
#A9C5DA
oklch(80.9% 0.042 240.5)
-
Step 400
400
#7BA6C7
oklch(70.6% 0.067 241.9)
-
Step 500
500
#5890B9
oklch(63.1% 0.086 241.7)
-
Step 600
600
#3B7AA5
oklch(55.7% 0.093 241.1)
-
Step 700
700
#2D668E
oklch(49.1% 0.088 242.2)
-
Step 800
800
#265373
oklch(42.6% 0.073 242.2)
-
Step 900
900 (this color)
#17384F
oklch(32.8% 0.056 241.7)
-
Step 950
950
#162936
oklch(27.1% 0.035 239.7)
#17384F 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) | #2E3850 | 0.029 |
| Deuteranopia (no green cones) | #26334F | 0.022 |
| Tritanopia (no blue cones) | #003E40 | 0.042 |
| Achromatopsia (no color) | #353535 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17384F
#17384F
oklch(32.8% 0.056 241.7)
- #492E14
#492E14
oklch(32.8% 0.056 62.6)
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 #17384F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.015
- Midnight Green #073B4C ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.020
- Gunmetal #293241 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.042
- Onyx #343A40 ΔE 0.046
- Marine Blue #01386A ΔE 0.049
- Charcoal #264653 ΔE 0.051
Use #17384F 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.