#174B6B
Closest named color: Dark Grey Blue (#29465B). oklch(39.5% 0.076 240.1), rgb(23, 75, 107).
Aa
White text reads best on this color (9.31:1).
About this color
#174B6B is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.076 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.030 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #174B6B |
| RGB | rgb(23, 75, 107) |
| HSL | hsl(203, 65%, 25%) |
| OKLCH | oklch(39.5% 0.076 240.1) |
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 #174B6B | 9.31:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #174B6B | 2.25:1 | Fails | Lc 12.7 | Not readable |
| #174B6B text on white | 9.31:1 | AAA | Lc 91.2 | Preferred for body text |
| #174B6B text on black | 2.25:1 | Fails | Lc -11.1 | 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 900.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DCEC
oklch(88.4% 0.032 240.7)
-
Step 300
300
#A0C6E2
oklch(80.8% 0.057 240.3)
-
Step 400
400
#69A8D4
oklch(70.6% 0.092 240.3)
-
Step 500
500
#3A92C9
oklch(63.2% 0.117 240)
-
Step 600
600
#027BB6
oklch(55.6% 0.128 240.3)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900 (this color)
#174B6B
oklch(39.5% 0.076 240.1)
-
Step 950
950
#0D293C
oklch(27% 0.049 241.5)
#174B6B 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) | #3C4B6C | 0.039 |
| Deuteranopia (no green cones) | #31436A | 0.033 |
| Tritanopia (no blue cones) | #005356 | 0.052 |
| Achromatopsia (no color) | #474747 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174B6B
#174B6B
oklch(39.5% 0.076 240.1)
- #643B16
#643B16
oklch(39.5% 0.077 59.4)
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 #174B6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.030
- Twilight Blue #0A437A ΔE 0.040
- Charcoal #264653 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.042
- Light Navy #155084 ΔE 0.042
- Deep Teal #00555A ΔE 0.050
- Dark Teal #014D4E ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.057
Use #174B6B 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.