#174A8A
Closest named color: Cobalt (#1E488F). oklch(41.3% 0.119 256.2), rgb(23, 74, 138).
Aa
White text reads best on this color (8.81:1).
About this color
#174A8A is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.119 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.012 away. White text reads best on it, at 8.81:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #174A8A |
| RGB | rgb(23, 74, 138) |
| HSL | hsl(213, 71%, 32%) |
| OKLCH | oklch(41.3% 0.119 256.2) |
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 #174A8A | 8.81:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #174A8A | 2.38:1 | Fails | Lc 14.3 | Not readable |
| #174A8A text on white | 8.81:1 | AAA | Lc 89.7 | Fine for body text |
| #174A8A text on black | 2.38:1 | Fails | Lc -12.5 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3EE
oklch(80.9% 0.07 256.6)
-
Step 400
400
#72A3E5
oklch(70.8% 0.111 256.1)
-
Step 500
500
#4B8ADE
oklch(63.1% 0.143 256.3)
-
Step 600
600
#2C72CB
oklch(55.5% 0.154 256.2)
-
Step 700
700
#1E5FB0
oklch(49% 0.144 256.2)
-
Step 800
800 (this color)
#174A8A
oklch(41.3% 0.119 256.2)
-
Step 900
900
#1D4272
oklch(37.8% 0.093 256)
-
Step 950
950
#122743
oklch(27.1% 0.059 256.2)
#174A8A 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) | #28508C | 0.024 |
| Deuteranopia (no green cones) | #0D4689 | 0.014 |
| Tritanopia (no blue cones) | #005963 | 0.090 |
| Achromatopsia (no color) | #4A4A4A | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174A8A
#174A8A
oklch(41.3% 0.119 256.2)
- #654300
#654300
oklch(41.1% 0.086 76.1)
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 #174A8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.012
- Light Navy #155084 ΔE 0.022
- Dusk Blue #26538D ΔE 0.031
- Twilight Blue #0A437A ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.055
- Blueberry #464196 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.063
Use #174A8A 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.