#21434E
Closest named color: Charcoal (#264653). oklch(36.2% 0.044 221.2), rgb(33, 67, 78).
Aa
White text reads best on this color (10.61:1).
About this color
#21434E is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.044 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.014 away. White text reads best on it, at 10.61:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #21434E |
| RGB | rgb(33, 67, 78) |
| HSL | hsl(195, 41%, 22%) |
| OKLCH | oklch(36.2% 0.044 221.2) |
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 #21434E | 10.61:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #21434E | 1.97:1 | Fails | Lc 9.4 | Not readable |
| #21434E text on white | 10.61:1 | AAA | Lc 94.5 | Preferred for body text |
| #21434E text on black | 1.97:1 | Fails | Lc -8.1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3EBEE
oklch(93.5% 0.009 222.1)
-
Step 200
200
#CDDCE2
oklch(88.5% 0.018 223.6)
-
Step 300
300
#AAC6D0
oklch(80.9% 0.033 221.4)
-
Step 400
400
#7CA9B8
oklch(70.8% 0.053 220.5)
-
Step 500
500
#5993A6
oklch(63.1% 0.067 220.9)
-
Step 600
600
#3C7D92
oklch(55.6% 0.074 221.7)
-
Step 700
700
#2E697C
oklch(49% 0.068 222)
-
Step 800
800
#275665
oklch(42.7% 0.057 221.5)
-
Step 900
900 (this color)
#21434E
oklch(36.2% 0.044 221.2)
-
Step 950
950
#162A30
oklch(27.1% 0.028 219)
#21434E 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) | #3C414F | 0.036 |
| Deuteranopia (no green cones) | #363C4E | 0.034 |
| Tritanopia (no blue cones) | #044746 | 0.030 |
| Achromatopsia (no color) | #3E3E3E | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21434E
#21434E
oklch(36.2% 0.044 221.2)
- #52362C
#52362C
oklch(36.3% 0.044 40.5)
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 #21434E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.014
- Dark Grey Blue #29465B ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.027
- Dark Teal #014D4E ΔE 0.036
- Midnight Green #073B4C ΔE 0.036
- Onyx #343A40 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.045
Use #21434E 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.