#133F4D
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.4% 0.053 222.8), rgb(19, 63, 77).
Aa
White text reads best on this color (11.37:1).
About this color
#133F4D is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.053 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.016 away. White text reads best on it, at 11.37:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.84:1 |
| White text | 11.37:1 |
Values
| HEX | #133F4D |
| RGB | rgb(19, 63, 77) |
| HSL | hsl(194, 60%, 19%) |
| OKLCH | oklch(34.4% 0.053 222.8) |
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 #133F4D | 11.37:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #133F4D | 1.84:1 | Fails | Lc 7.9 | Not readable |
| #133F4D text on white | 11.37:1 | AAA | Lc 96.0 | Preferred for body text |
| #133F4D text on black | 1.84:1 | 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
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A6C7D3
oklch(80.9% 0.039 221.9)
-
Step 400
400
#74AABE
oklch(70.8% 0.064 223.2)
-
Step 500
500
#4C94AD
oklch(63% 0.081 223.1)
-
Step 600
600
#2A7E99
oklch(55.5% 0.088 223.5)
-
Step 700
700
#1B6B82
oklch(49.2% 0.082 221.9)
-
Step 800
800
#1A576A
oklch(42.7% 0.068 222.8)
-
Step 900
900 (this color)
#133F4D
oklch(34.4% 0.053 222.8)
-
Step 950
950
#122A32
oklch(26.9% 0.033 222)
#133F4D 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) | #373D4E | 0.043 |
| Deuteranopia (no green cones) | #2F374D | 0.039 |
| Tritanopia (no blue cones) | #004343 | 0.028 |
| Achromatopsia (no color) | #3A3A3A | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133F4D
#133F4D
oklch(34.4% 0.053 222.8)
- #503022
#503022
oklch(34.5% 0.053 44.2)
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 #133F4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.016
- Midnight Green #073B4C ΔE 0.017
- Charcoal #264653 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.040
- Onyx #343A40 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.042
- Gunmetal #293241 ΔE 0.045
- Dark Teal #014D4E ΔE 0.047
Use #133F4D 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.