#133D4E
Closest named color: Midnight Green (#073B4C). oklch(33.9% 0.054 228.5), rgb(19, 61, 78).
Aa
White text reads best on this color (11.63:1).
About this color
#133D4E is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.054 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.011 away. White text reads best on it, at 11.63:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.80:1 |
| White text | 11.63:1 |
Values
| HEX | #133D4E |
| RGB | rgb(19, 61, 78) |
| HSL | hsl(197, 61%, 19%) |
| OKLCH | oklch(33.9% 0.054 228.5) |
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 #133D4E | 11.63:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #133D4E | 1.80:1 | Fails | Lc 7.3 | Not readable |
| #133D4E text on white | 11.63:1 | AAA | Lc 96.5 | Preferred for body text |
| #133D4E text on black | 1.80:1 | 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
#CBDCE5
oklch(88.4% 0.022 230.6)
-
Step 300
300
#A6C6D6
oklch(80.8% 0.041 229.5)
-
Step 400
400
#75A9C1
oklch(70.7% 0.065 228.5)
-
Step 500
500
#4E93B2
oklch(63.1% 0.084 229.3)
-
Step 600
600
#2D7D9D
oklch(55.5% 0.091 228.5)
-
Step 700
700
#1F6986
oklch(49% 0.084 228.8)
-
Step 800
800
#1C566D
oklch(42.7% 0.07 228.3)
-
Step 900
900 (this color)
#133D4E
oklch(33.9% 0.054 228.5)
-
Step 950
950
#132A34
oklch(27.1% 0.034 228.3)
#133D4E 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) | #343C4F | 0.039 |
| Deuteranopia (no green cones) | #2C364E | 0.034 |
| Tritanopia (no blue cones) | #004243 | 0.032 |
| Achromatopsia (no color) | #393939 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133D4E
#133D4E
oklch(33.9% 0.054 228.5)
- #4F2F1E
#4F2F1E
oklch(34.1% 0.055 48.2)
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 #133D4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.011
- Dark Blue Grey #1F3B4D ΔE 0.012
- Prussian Blue #1D3557 ΔE 0.035
- Charcoal #264653 ΔE 0.038
- Gunmetal #293241 ΔE 0.041
- Onyx #343A40 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.043
- Dark Teal #014D4E ΔE 0.054
Use #133D4E 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.