#174B89
Closest named color: Cobalt (#1E488F). oklch(41.4% 0.117 255.4), rgb(23, 75, 137).
Aa
White text reads best on this color (8.73:1).
About this color
#174B89 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.117 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.015 away. White text reads best on it, at 8.73:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #174B89 |
| RGB | rgb(23, 75, 137) |
| HSL | hsl(213, 71%, 31%) |
| OKLCH | oklch(41.4% 0.117 255.4) |
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 #174B89 | 8.73:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #174B89 | 2.40:1 | Fails | Lc 14.5 | Not readable |
| #174B89 text on white | 8.73:1 | AAA | Lc 89.5 | Fine for body text |
| #174B89 text on black | 2.40:1 | Fails | Lc -12.7 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#71A3E4
oklch(70.7% 0.11 255.4)
-
Step 500
500
#4B8BDC
oklch(63.2% 0.139 255.3)
-
Step 600
600
#2B73C9
oklch(55.6% 0.151 255.2)
-
Step 700
700
#1E60AE
oklch(49.1% 0.14 255.3)
-
Step 800
800 (this color)
#174B89
oklch(41.4% 0.117 255.4)
-
Step 900
900
#1D4271
oklch(37.8% 0.091 255.6)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#174B89 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) | #2B508B | 0.024 |
| Deuteranopia (no green cones) | #134688 | 0.015 |
| Tritanopia (no blue cones) | #005A63 | 0.089 |
| Achromatopsia (no color) | #4B4B4B | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174B89
#174B89
oklch(41.4% 0.117 255.4)
- #674300
#674300
oklch(41.4% 0.088 74.4)
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 #174B89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.015
- Light Navy #155084 ΔE 0.018
- Dusk Blue #26538D ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.031
- Twilight Blue #0A437A ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.052
- Blueberry #464196 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.063
Use #174B89 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.