#2F4AA3
Closest named color: Cobalt (#1E488F). oklch(44.1% 0.147 267.3), rgb(47, 74, 163).
Aa
White text reads best on this color (7.98:1).
About this color
#2F4AA3 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.147 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.038 away. White text reads best on it, at 7.98:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.62:1 |
| White text | 7.98:1 |
Values
| HEX | #2F4AA3 |
| RGB | rgb(47, 74, 163) |
| HSL | hsl(226, 55%, 41%) |
| OKLCH | oklch(44.1% 0.147 267.3) |
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 #2F4AA3 | 7.98:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #2F4AA3 | 2.62:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #2F4AA3 text on white | 7.98:1 | AAA | Lc 87.3 | Fine for body text |
| #2F4AA3 text on black | 2.62:1 | Fails | Lc -14.8 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A8BFF9
oklch(80.8% 0.086 267.7)
-
Step 400
400
#7A9CF6
oklch(70.6% 0.138 267.2)
-
Step 500
500
#5A80F3
oklch(63% 0.177 267.4)
-
Step 600
600
#4267E1
oklch(55.6% 0.19 267.2)
-
Step 700
700
#3454C4
oklch(49% 0.179 267.3)
-
Step 800
800 (this color)
#2F4AA3
oklch(44.1% 0.147 267.3)
-
Step 900
900
#273C7E
oklch(37.8% 0.115 267.4)
-
Step 950
950
#17244A
oklch(27.2% 0.073 267.3)
#2F4AA3 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) | #0556A6 | 0.036 |
| Deuteranopia (no green cones) | #004CA1 | 0.030 |
| Tritanopia (no blue cones) | #005F6F | 0.118 |
| Achromatopsia (no color) | #515151 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4AA3
#2F4AA3
oklch(44.1% 0.147 267.3)
- #684F00
#684F00
oklch(44.2% 0.09 87.5)
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 #2F4AA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.038
- Blueberry #464196 ΔE 0.040
- Dusk Blue #26538D ΔE 0.047
- Sapphire #2138AB ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.056
- Light Navy #155084 ΔE 0.060
- Denim Blue #3B5B92 ΔE 0.061
- Blue Blue #2242C7 ΔE 0.062
Use #2F4AA3 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.