#133B4A
Closest named color: Midnight Green (#073B4C). oklch(33.2% 0.051 226.4), rgb(19, 59, 74).
Aa
White text reads best on this color (11.98:1).
About this color
#133B4A is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.051 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.008 away. White text reads best on it, at 11.98:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.75:1 |
| White text | 11.98:1 |
Values
| HEX | #133B4A |
| RGB | rgb(19, 59, 74) |
| HSL | hsl(196, 59%, 18%) |
| OKLCH | oklch(33.2% 0.051 226.4) |
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 #133B4A | 11.98:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #133B4A | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #133B4A text on white | 11.98:1 | AAA | Lc 97.2 | Preferred for body text |
| #133B4A text on black | 1.75:1 | 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
#E3ECF0
oklch(93.7% 0.011 226)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A7C6D4
oklch(80.8% 0.039 226.9)
-
Step 400
400
#77A9BE
oklch(70.7% 0.061 226)
-
Step 500
500
#5193AE
oklch(63% 0.079 226.7)
-
Step 600
600
#327D9A
oklch(55.6% 0.086 227)
-
Step 700
700
#236A83
oklch(49.2% 0.079 225.5)
-
Step 800
800
#20566B
oklch(42.7% 0.066 227.2)
-
Step 900
900 (this color)
#133B4A
oklch(33.2% 0.051 226.4)
-
Step 950
950
#142A33
oklch(27.1% 0.033 226.5)
#133B4A 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) | #333A4B | 0.039 |
| Deuteranopia (no green cones) | #2B344A | 0.034 |
| Tritanopia (no blue cones) | #003F40 | 0.028 |
| Achromatopsia (no color) | #373737 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133B4A
#133B4A
oklch(33.2% 0.051 226.4)
- #4B2D1E
#4B2D1E
oklch(33.1% 0.051 47)
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 #133B4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.008
- Dark Blue Grey #1F3B4D ΔE 0.013
- Gunmetal #293241 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.036
- Onyx #343A40 ΔE 0.042
- Charcoal #264653 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.051
Use #133B4A 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.