#2F3C82
Closest named color: Cobalt (#1E488F). oklch(38.6% 0.118 271.8), rgb(47, 60, 130).
Aa
White text reads best on this color (10.05:1).
About this color
#2F3C82 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.118 and its hue 272°. 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 10.05:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.08:1 |
| White text | 10.05:1 |
Values
| HEX | #2F3C82 |
| RGB | rgb(47, 60, 130) |
| HSL | hsl(231, 47%, 35%) |
| OKLCH | oklch(38.6% 0.118 271.8) |
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 #2F3C82 | 10.05:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #2F3C82 | 2.08:1 | Fails | Lc 10.9 | Not readable |
| #2F3C82 text on white | 10.05:1 | AAA | Lc 93.0 | Preferred for body text |
| #2F3C82 text on black | 2.08:1 | Fails | Lc -9.4 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ACBEFB
oklch(81% 0.089 271.6)
-
Step 400
400
#8299F9
oklch(70.7% 0.143 272.1)
-
Step 500
500
#657DF5
oklch(63.2% 0.18 271.8)
-
Step 600
600
#4E62E4
oklch(55.5% 0.197 271.8)
-
Step 700
700
#4050C6
oklch(49% 0.183 271.9)
-
Step 800
800
#3443A0
oklch(42.7% 0.151 271.5)
-
Step 900
900 (this color)
#2F3C82
oklch(38.6% 0.118 271.8)
-
Step 950
950
#1A224A
oklch(26.9% 0.075 272)
#2F3C82 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) | #124684 | 0.035 |
| Deuteranopia (no green cones) | #003E81 | 0.038 |
| Tritanopia (no blue cones) | #004C59 | 0.100 |
| Achromatopsia (no color) | #424242 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3C82
#2F3C82
oklch(38.6% 0.118 271.8)
- #534200
#534200
oklch(38.6% 0.079 92.2)
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 #2F3C82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.038
- Twilight Blue #0A437A ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.042
- Blueberry #464196 ΔE 0.051
- Light Navy #155084 ΔE 0.058
- Marine Blue #01386A ΔE 0.062
- Dusk Blue #26538D ΔE 0.064
- Sapphire #2138AB ΔE 0.070
Use #2F3C82 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.