#21487E
Closest named color: Light Navy (#155084). oklch(40.3% 0.101 257.1), rgb(33, 72, 126).
Aa
White text reads best on this color (9.15:1).
About this color
#21487E is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.101 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.024 away. White text reads best on it, at 9.15:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #21487E |
| RGB | rgb(33, 72, 126) |
| HSL | hsl(215, 58%, 31%) |
| OKLCH | oklch(40.3% 0.101 257.1) |
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 #21487E | 9.15:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #21487E | 2.29:1 | Fails | Lc 13.2 | Not readable |
| #21487E text on white | 9.15:1 | AAA | Lc 90.8 | Preferred for body text |
| #21487E text on black | 2.29:1 | Fails | Lc -11.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CCDAEF
oklch(88.4% 0.033 258.4)
-
Step 300
300
#A9C3E7
oklch(81% 0.058 256.6)
-
Step 400
400
#7AA3DB
oklch(70.8% 0.094 256.4)
-
Step 500
500
#588AD2
oklch(63% 0.122 257.5)
-
Step 600
600
#3D73BF
oklch(55.6% 0.132 257.3)
-
Step 700
700
#2F60A5
oklch(49.1% 0.123 257.4)
-
Step 800
800 (this color)
#21487E
oklch(40.3% 0.101 257.1)
-
Step 900
900
#25426B
oklch(37.8% 0.079 257.2)
-
Step 950
950
#16273F
oklch(27.1% 0.05 257.1)
#21487E 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) | #2E4D80 | 0.022 |
| Deuteranopia (no green cones) | #1F447D | 0.012 |
| Tritanopia (no blue cones) | #00555D | 0.080 |
| Achromatopsia (no color) | #484848 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21487E
#21487E
oklch(40.3% 0.101 257.1)
- #614100
#614100
oklch(40.2% 0.084 77.1)
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 #21487E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.024
- Twilight Blue #0A437A ΔE 0.024
- Cobalt #1E488F ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.036
- Dusk Blue #26538D ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.062
Use #21487E 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.