#21496F
Closest named color: Dark Grey Blue (#29465B). oklch(39.6% 0.079 249.4), rgb(33, 73, 111).
Aa
White text reads best on this color (9.34:1).
About this color
#21496F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.079 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.034 away. White text reads best on it, at 9.34:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #21496F |
| RGB | rgb(33, 73, 111) |
| HSL | hsl(209, 54%, 28%) |
| OKLCH | oklch(39.6% 0.079 249.4) |
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 #21496F | 9.34:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #21496F | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #21496F text on white | 9.34:1 | AAA | Lc 91.4 | Preferred for body text |
| #21496F text on black | 2.24:1 | Fails | Lc -11.0 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A4C4E6
oklch(80.8% 0.059 250.1)
-
Step 400
400
#71A5D9
oklch(70.6% 0.095 249.3)
-
Step 500
500
#4A8ECF
oklch(63.1% 0.12 249.3)
-
Step 600
600
#2977BC
oklch(55.6% 0.131 249.3)
-
Step 700
700
#1A64A2
oklch(49.2% 0.121 248.9)
-
Step 800
800
#195184
oklch(42.6% 0.102 250)
-
Step 900
900 (this color)
#21496F
oklch(39.6% 0.079 249.4)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#21496F 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) | #384B71 | 0.028 |
| Deuteranopia (no green cones) | #2D436E | 0.020 |
| Tritanopia (no blue cones) | #005257 | 0.060 |
| Achromatopsia (no color) | #474747 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21496F
#21496F
oklch(39.6% 0.079 249.4)
- #613E0C
#613E0C
oklch(39.6% 0.079 70.2)
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 #21496F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.034
- Twilight Blue #0A437A ΔE 0.034
- Light Navy #155084 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.041
- Charcoal #264653 ΔE 0.047
- Cobalt #1E488F ΔE 0.055
- Dusk Blue #26538D ΔE 0.055
- Marine Blue #01386A ΔE 0.061
Use #21496F 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.