#212F3F
Closest named color: Gunmetal (#293241). oklch(30% 0.035 252.3), rgb(33, 47, 63).
Aa
White text reads best on this color (13.60:1).
About this color
#212F3F is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.035 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.017 away. White text reads best on it, at 13.60:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.54:1 |
| White text | 13.60:1 |
Values
| HEX | #212F3F |
| RGB | rgb(33, 47, 63) |
| HSL | hsl(212, 31%, 19%) |
| OKLCH | oklch(30% 0.035 252.3) |
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 #212F3F | 13.60:1 | AAA | Lc -103.2 | Preferred for body text |
| Black text on #212F3F | 1.54:1 | Fails | Lc 0.0 | Not readable |
| #212F3F text on white | 13.60:1 | AAA | Lc 100.1 | Preferred for body text |
| #212F3F text on black | 1.54:1 | 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 950.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AEC3DB
oklch(80.9% 0.041 251.8)
-
Step 400
400
#83A4C9
oklch(70.8% 0.066 251.6)
-
Step 500
500
#648DBB
oklch(63.2% 0.083 252)
-
Step 600
600
#4A76A8
oklch(55.6% 0.092 252.6)
-
Step 700
700
#3B6390
oklch(49.1% 0.086 252.5)
-
Step 800
800
#315175
oklch(42.7% 0.071 252.4)
-
Step 900
900
#2C435E
oklch(37.7% 0.055 253.1)
-
Step 950
950 (this color)
#212F3F
oklch(30% 0.035 252.3)
#212F3F 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) | #293040 | 0.013 |
| Deuteranopia (no green cones) | #252D3F | 0.008 |
| Tritanopia (no blue cones) | #163334 | 0.032 |
| Achromatopsia (no color) | #2E2E2E | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212F3F
#212F3F
oklch(30% 0.035 252.3)
- #392B1A
#392B1A
oklch(30% 0.035 71.3)
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 #212F3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.017
- Space Cadet #2B2D42 ΔE 0.018
- Oxford Blue #1B263B ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.042
- Dark #1B2431 ΔE 0.043
- Midnight Green #073B4C ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.043
- Jet #212529 ΔE 0.046
Use #212F3F 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.