#2F4B8A
Closest named color: Cobalt (#1E488F). oklch(42.5% 0.11 264.2), rgb(47, 75, 138).
Aa
White text reads best on this color (8.41:1).
About this color
#2F4B8A is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.110 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.022 away. White text reads best on it, at 8.41:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.49:1 |
| White text | 8.41:1 |
Values
| HEX | #2F4B8A |
| RGB | rgb(47, 75, 138) |
| HSL | hsl(222, 49%, 36%) |
| OKLCH | oklch(42.5% 0.11 264.2) |
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 #2F4B8A | 8.41:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #2F4B8A | 2.49:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #2F4B8A text on white | 8.41:1 | AAA | Lc 88.8 | Fine for body text |
| #2F4B8A text on black | 2.49:1 | Fails | Lc -13.4 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#80A0E1
oklch(70.8% 0.102 263.9)
-
Step 500
500
#6187D9
oklch(63.2% 0.131 264.2)
-
Step 600
600
#486FC6
oklch(55.7% 0.142 264.2)
-
Step 700
700
#395CAB
oklch(49% 0.133 264.1)
-
Step 800
800 (this color)
#2F4B8A
oklch(42.5% 0.11 264.2)
-
Step 900
900
#2A406F
oklch(37.8% 0.085 263.9)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#2F4B8A 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) | #2D528C | 0.020 |
| Deuteranopia (no green cones) | #1E4989 | 0.019 |
| Tritanopia (no blue cones) | #005963 | 0.092 |
| Achromatopsia (no color) | #4D4D4D | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4B8A
#2F4B8A
oklch(42.5% 0.11 264.2)
- #654900
#654900
oklch(42.4% 0.087 83.3)
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 #2F4B8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.022
- Dusk Blue #26538D ΔE 0.023
- Light Navy #155084 ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.041
- Blueberry #464196 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.045
- Twilight #4E518B ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.048
Use #2F4B8A 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.