#2F4EA5
Closest named color: Cobalt (#1E488F). oklch(45.1% 0.145 266), rgb(47, 78, 165).
Aa
White text reads best on this color (7.62:1).
About this color
#2F4EA5 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.145 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.044 away. White text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #2F4EA5 |
| RGB | rgb(47, 78, 165) |
| HSL | hsl(224, 56%, 42%) |
| OKLCH | oklch(45.1% 0.145 266) |
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 #2F4EA5 | 7.62:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #2F4EA5 | 2.75:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #2F4EA5 text on white | 7.62:1 | AAA | Lc 86.1 | Fine for body text |
| #2F4EA5 text on black | 2.75:1 | Fails | Lc -15.9 | Dividers and decoration only |
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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A7C0F8
oklch(80.9% 0.084 265.9)
-
Step 400
400
#799DF5
oklch(70.7% 0.135 266.2)
-
Step 500
500
#5782F1
oklch(63.1% 0.173 265.7)
-
Step 600
600
#3F68E0
oklch(55.6% 0.189 266.1)
-
Step 700
700
#3156C2
oklch(49.1% 0.174 265.8)
-
Step 800
800 (this color)
#2F4EA5
oklch(45.1% 0.145 266)
-
Step 900
900
#253C7D
oklch(37.6% 0.114 266.3)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#2F4EA5 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) | #1559A8 | 0.032 |
| Deuteranopia (no green cones) | #004EA3 | 0.029 |
| Tritanopia (no blue cones) | #006372 | 0.117 |
| Achromatopsia (no color) | #545454 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4EA5
#2F4EA5
oklch(45.1% 0.145 266)
- #6C5100
#6C5100
oklch(45.1% 0.092 86.3)
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 #2F4EA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.044
- Dusk Blue #26538D ΔE 0.044
- Blueberry #464196 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.054
- Sapphire #2138AB ΔE 0.059
- Twilight #4E518B ΔE 0.059
- Light Navy #155084 ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.063
Use #2F4EA5 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.