#174777
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.096 251.7), rgb(23, 71, 119).
Aa
White text reads best on this color (9.52:1).
About this color
#174777 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.096 and its hue 252°. 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 9.52:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.20:1 |
| White text | 9.52:1 |
Values
| HEX | #174777 |
| RGB | rgb(23, 71, 119) |
| HSL | hsl(210, 68%, 28%) |
| OKLCH | oklch(39.2% 0.096 251.7) |
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 #174777 | 9.52:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #174777 | 2.20:1 | Fails | Lc 12.2 | Not readable |
| #174777 text on white | 9.52:1 | AAA | Lc 91.7 | Preferred for body text |
| #174777 text on black | 2.20:1 | Fails | Lc -10.7 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DCF3
oklch(88.6% 0.039 250.7)
-
Step 300
300
#9FC4EE
oklch(80.8% 0.072 251.9)
-
Step 400
400
#69A5E6
oklch(70.8% 0.115 251.5)
-
Step 500
500
#3B8CDF
oklch(63% 0.148 251.8)
-
Step 600
600
#0D74CD
oklch(55.5% 0.161 252)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#05508F
oklch(42.7% 0.123 251.4)
-
Step 900
900 (this color)
#174777
oklch(39.2% 0.096 251.7)
-
Step 950
950
#0D2743
oklch(26.9% 0.061 252.5)
#174777 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) | #304A79 | 0.027 |
| Deuteranopia (no green cones) | #214176 | 0.018 |
| Tritanopia (no blue cones) | #005259 | 0.071 |
| Achromatopsia (no color) | #454545 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174777
#174777
oklch(39.2% 0.096 251.7)
- #613D00
#613D00
oklch(39.3% 0.084 72.1)
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 #174777, 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 0.032
- Deep Sea Blue #015482 ΔE 0.040
- Cobalt #1E488F ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.049
- Dusk Blue #26538D ΔE 0.051
- Marine Blue #01386A ΔE 0.053
- Charcoal #264653 ΔE 0.062
Use #174777 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.