#2F4574
Closest named color: Twilight Blue (#0A437A). oklch(39.6% 0.084 264), rgb(47, 69, 116).
Aa
White text reads best on this color (9.44:1).
About this color
#2F4574 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.084 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 9.44:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.22:1 |
| White text | 9.44:1 |
Values
| HEX | #2F4574 |
| RGB | rgb(47, 69, 116) |
| HSL | hsl(221, 42%, 32%) |
| OKLCH | oklch(39.6% 0.084 264) |
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 #2F4574 | 9.44:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #2F4574 | 2.22:1 | Fails | Lc 12.3 | Not readable |
| #2F4574 text on white | 9.44:1 | AAA | Lc 91.7 | Preferred for body text |
| #2F4574 text on black | 2.22:1 | Fails | Lc -10.7 | 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 900.
-
Step 50
50
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F1
oklch(88.4% 0.036 264.4)
-
Step 300
300
#ACC1EA
oklch(80.9% 0.063 263.7)
-
Step 400
400
#80A0E0
oklch(70.7% 0.101 263.6)
-
Step 500
500
#6187D8
oklch(63.2% 0.13 264)
-
Step 600
600
#486FC5
oklch(55.6% 0.141 264)
-
Step 700
700
#395CAA
oklch(49% 0.131 264)
-
Step 800
800
#304C8A
oklch(42.8% 0.108 264.1)
-
Step 900
900 (this color)
#2F4574
oklch(39.6% 0.084 264)
-
Step 950
950
#192641
oklch(27.2% 0.054 263.7)
#2F4574 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) | #314976 | 0.013 |
| Deuteranopia (no green cones) | #294373 | 0.010 |
| Tritanopia (no blue cones) | #004F57 | 0.075 |
| Achromatopsia (no color) | #464646 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4574
#2F4574
oklch(39.6% 0.084 264)
- #5B4200
#5B4200
oklch(39.6% 0.081 84.1)
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 #2F4574, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Light Navy #155084 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.046
- Cobalt #1E488F ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.050
- Dusk Blue #26538D ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.059
- Charcoal #264653 ΔE 0.060
Use #2F4574 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.