#212757
Closest named color: Marine (#042E60). oklch(29.6% 0.086 274.5), rgb(33, 39, 87).
Aa
White text reads best on this color (14.07:1).
About this color
#212757 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.086 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.034 away. White text reads best on it, at 14.07:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.49:1 |
| White text | 14.07:1 |
Values
| HEX | #212757 |
| RGB | rgb(33, 39, 87) |
| HSL | hsl(233, 45%, 24%) |
| OKLCH | oklch(29.6% 0.086 274.5) |
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 #212757 | 14.07:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #212757 | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #212757 text on white | 14.07:1 | AAA | Lc 100.6 | Preferred for body text |
| #212757 text on black | 1.49:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8597FF
oklch(70.8% 0.153 274.4)
-
Step 500
500
#6978FF
oklch(63.1% 0.199 274.4)
-
Step 600
600
#5359F4
oklch(55.6% 0.227 274.5)
-
Step 700
700
#4547D4
oklch(49% 0.21 274.8)
-
Step 800
800
#383CAC
oklch(42.7% 0.175 274.6)
-
Step 900
900
#2F3588
oklch(37.7% 0.137 274.6)
-
Step 950
950 (this color)
#212757
oklch(29.6% 0.086 274.5)
#212757 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) | #0D2E59 | 0.028 |
| Deuteranopia (no green cones) | #042956 | 0.031 |
| Tritanopia (no blue cones) | #02323B | 0.075 |
| Achromatopsia (no color) | #2B2B2B | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212757
#212757
oklch(29.6% 0.086 274.5)
- #372C00
#372C00
oklch(29.7% 0.061 94.1)
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 #212757, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.053
- Midnight Blue #191970 ΔE 0.058
- Marine Blue #01386A ΔE 0.058
- Gunmetal #293241 ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.070
Use #212757 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.