#21476B
Closest named color: Dark Grey Blue (#29465B). oklch(38.8% 0.075 249.2), rgb(33, 71, 107).
Aa
White text reads best on this color (9.64:1).
About this color
#21476B is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.075 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.028 away. White text reads best on it, at 9.64:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.17:1 |
| White text | 9.64:1 |
Values
| HEX | #21476B |
| RGB | rgb(33, 71, 107) |
| HSL | hsl(209, 53%, 27%) |
| OKLCH | oklch(38.8% 0.075 249.2) |
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 #21476B | 9.64:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #21476B | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #21476B text on white | 9.64:1 | AAA | Lc 92.1 | Preferred for body text |
| #21476B text on black | 2.17:1 | Fails | Lc -10.3 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A5C4E4
oklch(80.8% 0.056 249.4)
-
Step 400
400
#74A5D7
oklch(70.7% 0.091 249.7)
-
Step 500
500
#4D8ECC
oklch(63.1% 0.115 249.1)
-
Step 600
600
#2E77B9
oklch(55.6% 0.125 249.3)
-
Step 700
700
#2064A0
oklch(49.2% 0.117 249.4)
-
Step 800
800
#1D5281
oklch(42.8% 0.096 248.9)
-
Step 900
900 (this color)
#21476B
oklch(38.8% 0.075 249.2)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#21476B 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) | #37496D | 0.027 |
| Deuteranopia (no green cones) | #2D416A | 0.021 |
| Tritanopia (no blue cones) | #004F54 | 0.057 |
| Achromatopsia (no color) | #454545 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21476B
#21476B
oklch(38.8% 0.075 249.2)
- #5E3C0F
#5E3C0F
oklch(38.8% 0.075 69)
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 #21476B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.028
- Twilight Blue #0A437A ΔE 0.034
- Charcoal #264653 ΔE 0.041
- Light Navy #155084 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.049
- Marine Blue #01386A ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.058
- Cobalt #1E488F ΔE 0.061
Use #21476B 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.