#213D52
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.8% 0.05 242.5), rgb(33, 61, 82).
Aa
White text reads best on this color (11.32:1).
About this color
#213D52 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.050 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.010 away. White text reads best on it, at 11.32:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.85:1 |
| White text | 11.32:1 |
Values
| HEX | #213D52 |
| RGB | rgb(33, 61, 82) |
| HSL | hsl(206, 43%, 23%) |
| OKLCH | oklch(34.8% 0.05 242.5) |
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 #213D52 | 11.32:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #213D52 | 1.85:1 | Fails | Lc 7.9 | Not readable |
| #213D52 text on white | 11.32:1 | AAA | Lc 96.0 | Preferred for body text |
| #213D52 text on black | 1.85:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ACC4D7
oklch(80.8% 0.038 241.9)
-
Step 400
400
#80A6C4
oklch(70.8% 0.061 242.5)
-
Step 500
500
#5F8FB4
oklch(63% 0.076 242.6)
-
Step 600
600
#4479A0
oklch(55.6% 0.083 242.2)
-
Step 700
700
#356689
oklch(49.2% 0.077 241.7)
-
Step 800
800
#2D536F
oklch(42.7% 0.064 242.2)
-
Step 900
900 (this color)
#213D52
oklch(34.8% 0.05 242.5)
-
Step 950
950
#182835
oklch(26.9% 0.033 243.9)
#213D52 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) | #343D53 | 0.026 |
| Deuteranopia (no green cones) | #2D3852 | 0.021 |
| Tritanopia (no blue cones) | #014244 | 0.042 |
| Achromatopsia (no color) | #3A3A3A | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213D52
#213D52
oklch(34.8% 0.05 242.5)
- #4D341D
#4D341D
oklch(34.9% 0.051 62.5)
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 #213D52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.010
- Midnight Green #073B4C ΔE 0.026
- Prussian Blue #1D3557 ΔE 0.031
- Charcoal #264653 ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.033
- Onyx #343A40 ΔE 0.037
- Gunmetal #293241 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.050
Use #213D52 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.