#215178
Closest named color: Deep Sea Blue (#015482). oklch(42.1% 0.083 246.1), rgb(33, 81, 120).
Aa
White text reads best on this color (8.35:1).
About this color
#215178 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.083 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.021 away. White text reads best on it, at 8.35:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.51:1 |
| White text | 8.35:1 |
Values
| HEX | #215178 |
| RGB | rgb(33, 81, 120) |
| HSL | hsl(207, 57%, 30%) |
| OKLCH | oklch(42.1% 0.083 246.1) |
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 #215178 | 8.35:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #215178 | 2.51:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #215178 text on white | 8.35:1 | AAA | Lc 88.6 | Fine for body text |
| #215178 text on black | 2.51:1 | Fails | Lc -13.6 | 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 800.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CBDBEA
oklch(88.4% 0.027 246.4)
-
Step 300
300
#A8C4DF
oklch(80.8% 0.049 247.5)
-
Step 400
400
#78A6CF
oklch(70.8% 0.078 246.1)
-
Step 500
500
#538FC2
oklch(63.1% 0.1 245.9)
-
Step 600
600
#3678AF
oklch(55.5% 0.109 246.6)
-
Step 700
700
#286596
oklch(49.1% 0.1 246.2)
-
Step 800
800 (this color)
#215178
oklch(42.1% 0.083 246.1)
-
Step 900
900
#224562
oklch(37.8% 0.064 245.6)
-
Step 950
950
#152839
oklch(26.9% 0.04 246.9)
#215178 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) | #3F527A | 0.034 |
| Deuteranopia (no green cones) | #334A77 | 0.025 |
| Tritanopia (no blue cones) | #005A5F | 0.060 |
| Achromatopsia (no color) | #4E4E4E | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #215178
#215178
oklch(42.1% 0.083 246.1)
- #6C4312
#6C4312
oklch(42.2% 0.084 65.9)
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 #215178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.021
- Light Navy #155084 ΔE 0.022
- Dusk Blue #26538D ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.049
- Cobalt #1E488F ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.053
Use #215178 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.