#2F4180
Closest named color: Cobalt (#1E488F). oklch(39.5% 0.108 269), rgb(47, 65, 128).
Aa
White text reads best on this color (9.59:1).
About this color
#2F4180 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.108 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.032 away. White text reads best on it, at 9.59:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.18:1 |
| White text | 9.59:1 |
Values
| HEX | #2F4180 |
| RGB | rgb(47, 65, 128) |
| HSL | hsl(227, 46%, 34%) |
| OKLCH | oklch(39.5% 0.108 269) |
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 #2F4180 | 9.59:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #2F4180 | 2.18:1 | Fails | Lc 12.0 | Not readable |
| #2F4180 text on white | 9.59:1 | AAA | Lc 92.0 | Preferred for body text |
| #2F4180 text on black | 2.18:1 | Fails | Lc -10.4 | 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 900.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F8
oklch(88.6% 0.045 268.7)
-
Step 300
300
#ABBFF6
oklch(80.9% 0.081 269)
-
Step 400
400
#809CF2
oklch(70.8% 0.13 269.2)
-
Step 500
500
#6181ED
oklch(63.2% 0.166 268.9)
-
Step 600
600
#4967DB
oklch(55.5% 0.18 268.9)
-
Step 700
700
#3B55BE
oklch(49.1% 0.167 268.9)
-
Step 800
800
#31469A
oklch(42.7% 0.139 269.2)
-
Step 900
900 (this color)
#2F4180
oklch(39.5% 0.108 269)
-
Step 950
950
#192448
oklch(27.1% 0.068 268.7)
#2F4180 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) | #224982 | 0.024 |
| Deuteranopia (no green cones) | #13427F | 0.027 |
| Tritanopia (no blue cones) | #004F5A | 0.093 |
| Achromatopsia (no color) | #454545 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4180
#2F4180
oklch(39.5% 0.108 269)
- #584300
#584300
oklch(39.4% 0.081 88.3)
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 #2F4180, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.032
- Twilight Blue #0A437A ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.043
- Light Navy #155084 ΔE 0.045
- Blueberry #464196 ΔE 0.050
- Dusk Blue #26538D ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.058
- Marine Blue #01386A ΔE 0.064
Use #2F4180 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.