#174166
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.079 248.5), rgb(23, 65, 102).
Aa
White text reads best on this color (10.58:1).
About this color
#174166 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.079 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.034 away. White text reads best on it, at 10.58:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.58:1 |
Values
| HEX | #174166 |
| RGB | rgb(23, 65, 102) |
| HSL | hsl(208, 63%, 25%) |
| OKLCH | oklch(36.6% 0.079 248.5) |
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 #174166 | 10.58:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #174166 | 1.98:1 | Fails | Lc 9.6 | Not readable |
| #174166 text on white | 10.58:1 | AAA | Lc 94.3 | Preferred for body text |
| #174166 text on black | 1.98:1 | Fails | Lc -8.3 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCEE
oklch(88.6% 0.032 246.7)
-
Step 300
300
#A3C5E6
oklch(81% 0.059 247.8)
-
Step 400
400
#70A6D9
oklch(70.8% 0.094 247.9)
-
Step 500
500
#488ECF
oklch(63% 0.121 248.8)
-
Step 600
600
#2577BC
oklch(55.5% 0.132 248.6)
-
Step 700
700
#1664A2
oklch(49.1% 0.122 248.3)
-
Step 800
800
#175283
oklch(42.7% 0.1 248.2)
-
Step 900
900 (this color)
#174166
oklch(36.6% 0.079 248.5)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#174166 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) | #304368 | 0.029 |
| Deuteranopia (no green cones) | #253B65 | 0.021 |
| Tritanopia (no blue cones) | #004A4E | 0.059 |
| Achromatopsia (no color) | #3F3F3F | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174166
#174166
oklch(36.6% 0.079 248.5)
- #593501
#593501
oklch(36.5% 0.079 68.3)
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 #174166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.034
- Twilight Blue #0A437A ΔE 0.034
- Marine Blue #01386A ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.041
- Charcoal #264653 ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.043
- Midnight Green #073B4C ΔE 0.050
- Light Navy #155084 ΔE 0.062
Use #174166 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.