#212F6F
Closest named color: Marine Blue (#01386A). oklch(33.4% 0.112 270), rgb(33, 47, 111).
Aa
White text reads best on this color (12.34:1).
About this color
#212F6F is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.112 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.035 away. White text reads best on it, at 12.34:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.70:1 |
| White text | 12.34:1 |
Values
| HEX | #212F6F |
| RGB | rgb(33, 47, 111) |
| HSL | hsl(229, 54%, 28%) |
| OKLCH | oklch(33.4% 0.112 270) |
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 #212F6F | 12.34:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #212F6F | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #212F6F text on white | 12.34:1 | AAA | Lc 97.8 | Preferred for body text |
| #212F6F text on black | 1.70:1 | Fails | Lc 0.0 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBFF8
oklch(81% 0.084 269.5)
-
Step 400
400
#809BF4
oklch(70.7% 0.134 269.9)
-
Step 500
500
#627FF0
oklch(63% 0.172 270)
-
Step 600
600
#4B65DF
oklch(55.6% 0.188 270.1)
-
Step 700
700
#3D53C1
oklch(49% 0.173 270.2)
-
Step 800
800
#32459C
oklch(42.7% 0.143 270)
-
Step 900
900 (this color)
#212F6F
oklch(33.4% 0.112 270)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#212F6F 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) | #003871 | 0.032 |
| Deuteranopia (no green cones) | #00316E | 0.027 |
| Tritanopia (no blue cones) | #003E4A | 0.091 |
| Achromatopsia (no color) | #353535 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212F6F
#212F6F
oklch(33.4% 0.112 270)
- #443400
#443400
oklch(33.3% 0.068 89.7)
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 #212F6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.035
- Marine #042E60 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.049
- Midnight Blue #191970 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.076
- Space Cadet #2B2D42 ΔE 0.080
- Midnight Green #073B4C ΔE 0.081
Use #212F6F 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.