#174E6F
Closest named color: Deep Sea Blue (#015482). oklch(40.5% 0.079 239.7), rgb(23, 78, 111).
Aa
White text reads best on this color (8.91:1).
About this color
#174E6F is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.079 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.033 away. White text reads best on it, at 8.91:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.35:1 |
| White text | 8.91:1 |
Values
| HEX | #174E6F |
| RGB | rgb(23, 78, 111) |
| HSL | hsl(203, 66%, 26%) |
| OKLCH | oklch(40.5% 0.079 239.7) |
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 #174E6F | 8.91:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #174E6F | 2.35:1 | Fails | Lc 13.8 | Not readable |
| #174E6F text on white | 8.91:1 | AAA | Lc 90.1 | Preferred for body text |
| #174E6F text on black | 2.35:1 | Fails | Lc -12.1 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCE9
oklch(88.6% 0.026 240.7)
-
Step 300
300
#A6C5DC
oklch(80.8% 0.047 240.3)
-
Step 400
400
#76A7CA
oklch(70.7% 0.073 240.2)
-
Step 500
500
#4F91BD
oklch(63.1% 0.095 239.8)
-
Step 600
600
#307BA9
oklch(55.7% 0.102 239.4)
-
Step 700
700
#216791
oklch(49.1% 0.096 239.7)
-
Step 800
800 (this color)
#174E6F
oklch(40.5% 0.079 239.7)
-
Step 900
900
#1F465F
oklch(37.8% 0.062 239.4)
-
Step 950
950
#132937
oklch(27% 0.038 238.3)
#174E6F 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) | #3E4E70 | 0.041 |
| Deuteranopia (no green cones) | #32466E | 0.033 |
| Tritanopia (no blue cones) | #005659 | 0.053 |
| Achromatopsia (no color) | #4A4A4A | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174E6F
#174E6F
oklch(40.5% 0.079 239.7)
- #683D17
#683D17
oklch(40.4% 0.079 58.8)
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 #174E6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.033
- Light Navy #155084 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.037
- Twilight Blue #0A437A ΔE 0.044
- Charcoal #264653 ΔE 0.048
- Deep Teal #00555A ΔE 0.049
- Dusk Blue #26538D ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.057
Use #174E6F 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.