#174F6F
Closest named color: Deep Sea Blue (#015482). oklch(40.8% 0.078 238.5), rgb(23, 79, 111).
Aa
White text reads best on this color (8.80:1).
About this color
#174F6F is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.078 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.032 away. White text reads best on it, at 8.80:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.38:1 |
| White text | 8.80:1 |
Values
| HEX | #174F6F |
| RGB | rgb(23, 79, 111) |
| HSL | hsl(202, 66%, 26%) |
| OKLCH | oklch(40.8% 0.078 238.5) |
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 #174F6F | 8.80:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #174F6F | 2.38:1 | Fails | Lc 14.1 | Not readable |
| #174F6F text on white | 8.80:1 | AAA | Lc 89.8 | Fine for body text |
| #174F6F text on black | 2.38:1 | Fails | Lc -12.4 | 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
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A6C5DB
oklch(80.8% 0.046 239.1)
-
Step 400
400
#75A8C9
oklch(70.8% 0.073 237.5)
-
Step 500
500
#4F91BC
oklch(63.1% 0.094 239.2)
-
Step 600
600
#2F7BA8
oklch(55.7% 0.101 238.6)
-
Step 700
700
#206790
oklch(49% 0.095 238.8)
-
Step 800
800 (this color)
#174F6F
oklch(40.8% 0.078 238.5)
-
Step 900
900
#1F465E
oklch(37.7% 0.06 238.3)
-
Step 950
950
#132937
oklch(27% 0.038 238.3)
#174F6F 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) | #404F70 | 0.043 |
| Deuteranopia (no green cones) | #34476E | 0.034 |
| Tritanopia (no blue cones) | #00575A | 0.051 |
| Achromatopsia (no color) | #4A4A4A | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174F6F
#174F6F
oklch(40.8% 0.078 238.5)
- #693E19
#693E19
oklch(40.8% 0.079 58.3)
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 #174F6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.032
- Light Navy #155084 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.039
- Twilight Blue #0A437A ΔE 0.047
- Deep Teal #00555A ΔE 0.047
- Charcoal #264653 ΔE 0.049
- Dusk Blue #26538D ΔE 0.053
- Petrol #005F6A ΔE 0.054
Use #174F6F 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.