#2F4E88
Closest named color: Dusk Blue (#26538D). oklch(43% 0.103 261.8), rgb(47, 78, 136).
Aa
White text reads best on this color (8.18:1).
About this color
#2F4E88 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.103 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.016 away. White text reads best on it, at 8.18:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.56:1 |
| White text | 8.18:1 |
Values
| HEX | #2F4E88 |
| RGB | rgb(47, 78, 136) |
| HSL | hsl(219, 49%, 36%) |
| OKLCH | oklch(43% 0.103 261.8) |
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 #2F4E88 | 8.18:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #2F4E88 | 2.56:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #2F4E88 text on white | 8.18:1 | AAA | Lc 88.1 | Fine for body text |
| #2F4E88 text on black | 2.56:1 | Fails | Lc -14.1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CDDAF0
oklch(88.5% 0.033 261)
-
Step 300
300
#ABC1E8
oklch(80.8% 0.06 261.9)
-
Step 400
400
#7FA1DD
oklch(70.7% 0.096 261.4)
-
Step 500
500
#5F88D4
oklch(63.1% 0.124 261.9)
-
Step 600
600
#4671C1
oklch(55.7% 0.134 261.7)
-
Step 700
700
#375EA7
oklch(49.1% 0.125 261.7)
-
Step 800
800 (this color)
#2F4E88
oklch(43% 0.103 261.8)
-
Step 900
900
#29416C
oklch(37.8% 0.08 261.3)
-
Step 950
950
#18263F
oklch(27% 0.051 261.4)
#2F4E88 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) | #34548A | 0.019 |
| Deuteranopia (no green cones) | #274B87 | 0.013 |
| Tritanopia (no blue cones) | #005B64 | 0.086 |
| Achromatopsia (no color) | #4F4F4F | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4E88
#2F4E88
oklch(43% 0.103 261.8)
- #684A00
#684A00
oklch(43% 0.089 81.9)
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 #2F4E88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.016
- Light Navy #155084 ΔE 0.023
- Cobalt #1E488F ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.043
- Twilight #4E518B ΔE 0.044
- Dusk #4E5481 ΔE 0.048
Use #2F4E88 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.