#21495E
Closest named color: Dark Grey Blue (#29465B). oklch(38.6% 0.057 233.9), rgb(33, 73, 94).
Aa
White text reads best on this color (9.63:1).
About this color
#21495E is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.057 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.011 away. White text reads best on it, at 9.63:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.17:1 |
| White text | 9.63:1 |
Values
| HEX | #21495E |
| RGB | rgb(33, 73, 94) |
| HSL | hsl(201, 48%, 25%) |
| OKLCH | oklch(38.6% 0.057 233.9) |
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 #21495E | 9.63:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #21495E | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #21495E text on white | 9.63:1 | AAA | Lc 92.2 | Preferred for body text |
| #21495E 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A6C6D9
oklch(80.9% 0.044 234.1)
-
Step 400
400
#75A8C5
oklch(70.6% 0.069 234)
-
Step 500
500
#4E92B7
oklch(63% 0.089 234.4)
-
Step 600
600
#2E7CA3
oklch(55.6% 0.096 234.2)
-
Step 700
700
#1F688B
oklch(49% 0.089 234)
-
Step 800
800
#1D5571
oklch(42.6% 0.074 234.2)
-
Step 900
900 (this color)
#21495E
oklch(38.6% 0.057 233.9)
-
Step 950
950
#132935
oklch(26.9% 0.036 234.1)
#21495E 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) | #3F485F | 0.037 |
| Deuteranopia (no green cones) | #36425E | 0.031 |
| Tritanopia (no blue cones) | #004F50 | 0.041 |
| Achromatopsia (no color) | #454545 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21495E
#21495E
oklch(38.6% 0.057 233.9)
- #5C3B25
#5C3B25
oklch(38.6% 0.058 53.9)
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 #21495E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.011
- Charcoal #264653 ΔE 0.019
- Dark Slate Gray #2F4F4F ΔE 0.040
- Dark Teal #014D4E ΔE 0.040
- Deep Teal #00555A ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.053
- Dark Blue Green #005249 ΔE 0.057
Use #21495E 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.