#143F4E
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.5% 0.053 224.8), rgb(20, 63, 78).
Aa
White text reads best on this color (11.34:1).
About this color
#143F4E is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.053 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.015 away. White text reads best on it, at 11.34:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.85:1 |
| White text | 11.34:1 |
Values
| HEX | #143F4E |
| RGB | rgb(20, 63, 78) |
| HSL | hsl(196, 59%, 19%) |
| OKLCH | oklch(34.5% 0.053 224.8) |
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 #143F4E | 11.34:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #143F4E | 1.85:1 | Fails | Lc 7.9 | Not readable |
| #143F4E text on white | 11.34:1 | AAA | Lc 96.0 | Preferred for body text |
| #143F4E text on black | 1.85:1 | Fails | Lc 0.0 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A6C7D4
oklch(81% 0.04 223.7)
-
Step 400
400
#74AABF
oklch(70.8% 0.064 224.3)
-
Step 500
500
#4D94AF
oklch(63.1% 0.082 225.2)
-
Step 600
600
#2B7E9A
oklch(55.6% 0.089 224.5)
-
Step 700
700
#1D6A84
oklch(49.1% 0.083 225.4)
-
Step 800
800
#1B576B
oklch(42.8% 0.068 224.2)
-
Step 900
900 (this color)
#143F4E
oklch(34.5% 0.053 224.8)
-
Step 950
950
#122A33
oklch(27% 0.034 224.8)
#143F4E 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) | #373E4F | 0.042 |
| Deuteranopia (no green cones) | #2F384E | 0.036 |
| Tritanopia (no blue cones) | #004444 | 0.030 |
| Achromatopsia (no color) | #3A3A3A | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #143F4E
#143F4E
oklch(34.5% 0.053 224.8)
- #503021
#503021
oklch(34.5% 0.053 45.6)
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 #143F4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.015
- Midnight Green #073B4C ΔE 0.017
- Charcoal #264653 ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.041
- Onyx #343A40 ΔE 0.041
- Gunmetal #293241 ΔE 0.045
- Dark Teal #014D4E ΔE 0.047
Use #143F4E 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.