#212AA3
Closest named color: Sapphire (#2138AB). oklch(37.6% 0.189 270), rgb(33, 42, 163).
Aa
White text reads best on this color (10.91:1).
About this color
#212AA3 is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.189 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.033 away. White text reads best on it, at 10.91:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 1.92:1 |
| White text | 10.91:1 |
Values
| HEX | #212AA3 |
| RGB | rgb(33, 42, 163) |
| HSL | hsl(236, 66%, 38%) |
| OKLCH | oklch(37.6% 0.189 270) |
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 #212AA3 | 10.91:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #212AA3 | 1.92:1 | Fails | Lc 9.7 | Not readable |
| #212AA3 text on white | 10.91:1 | AAA | Lc 94.3 | Preferred for body text |
| #212AA3 text on black | 1.92:1 | Fails | Lc -8.3 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#4259FF
oklch(55.6% 0.245 269.9)
-
Step 700
700
#332DFF
oklch(49.1% 0.287 270.1)
-
Step 800
800
#2828D0
oklch(42.7% 0.242 269.9)
-
Step 900
900 (this color)
#212AA3
oklch(37.6% 0.189 270)
-
Step 950
950
#121B60
oklch(26.9% 0.121 269.9)
#212AA3 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) | #0043A7 | 0.054 |
| Deuteranopia (no green cones) | #0036A1 | 0.028 |
| Tritanopia (no blue cones) | #004D64 | 0.146 |
| Achromatopsia (no color) | #3D3D3D | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212AA3
#212AA3
oklch(37.6% 0.189 270)
- #513F00
#513F00
oklch(37.6% 0.077 90.4)
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 #212AA3, closest first.
No curated palette has a color within ΔE 0.04 of #212AA3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.033
- Indigo Blue #3A18B1 ΔE 0.044
- Ultramarine #2000B1 ΔE 0.047
- Royal #0C1793 ΔE 0.055
- Cobalt Blue #030AA7 ΔE 0.056
- Imperial Purple #480CA8 ΔE 0.068
- True Blue #010FCC ΔE 0.075
- Cobalt #1E488F ΔE 0.078
Use #212AA3 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.