#174A70
Closest named color: Twilight Blue (#0A437A). oklch(39.5% 0.083 245), rgb(23, 74, 112).
Aa
White text reads best on this color (9.33:1).
About this color
#174A70 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.083 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.032 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #174A70 |
| RGB | rgb(23, 74, 112) |
| HSL | hsl(206, 66%, 26%) |
| OKLCH | oklch(39.5% 0.083 245) |
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 #174A70 | 9.33:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #174A70 | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #174A70 text on white | 9.33:1 | AAA | Lc 91.3 | Preferred for body text |
| #174A70 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF5
oklch(93.5% 0.018 245.4)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#9FC6E7
oklch(81% 0.063 244.2)
-
Step 400
400
#69A7DB
oklch(70.7% 0.1 245.2)
-
Step 500
500
#3A90D1
oklch(63.1% 0.128 244.9)
-
Step 600
600
#0379BE
oklch(55.6% 0.138 244.8)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800
#015385
oklch(42.7% 0.107 244.9)
-
Step 900
900 (this color)
#174A70
oklch(39.5% 0.083 245)
-
Step 950
950
#0C293E
oklch(27.1% 0.052 243.5)
#174A70 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) | #384B72 | 0.035 |
| Deuteranopia (no green cones) | #2C436F | 0.026 |
| Tritanopia (no blue cones) | #005358 | 0.058 |
| Achromatopsia (no color) | #474747 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174A70
#174A70
oklch(39.5% 0.083 245)
- #643B08
#643B08
oklch(39.3% 0.083 64.9)
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 #174A70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.032
- Light Navy #155084 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.038
- Charcoal #264653 ΔE 0.049
- Cobalt #1E488F ΔE 0.055
- Dusk Blue #26538D ΔE 0.055
- Deep Teal #00555A ΔE 0.060
Use #174A70 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.