#233C45
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34% 0.035 222.9), rgb(35, 60, 69).
Aa
White text reads best on this color (11.64:1).
About this color
#233C45 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.035 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 11.64:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.80:1 |
| White text | 11.64:1 |
Values
| HEX | #233C45 |
| RGB | rgb(35, 60, 69) |
| HSL | hsl(196, 33%, 20%) |
| OKLCH | oklch(34% 0.035 222.9) |
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 #233C45 | 11.64:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #233C45 | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #233C45 text on white | 11.64:1 | AAA | Lc 96.7 | Preferred for body text |
| #233C45 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#CFDBE0
oklch(88.4% 0.015 224.5)
-
Step 300
300
#AFC5CD
oklch(80.9% 0.026 221.6)
-
Step 400
400
#85A7B4
oklch(70.7% 0.042 223.2)
-
Step 500
500
#6691A1
oklch(63.1% 0.053 223.1)
-
Step 600
600
#4C7B8C
oklch(55.6% 0.058 223)
-
Step 700
700
#3D6877
oklch(49.2% 0.053 222.4)
-
Step 800
800
#325561
oklch(42.8% 0.045 221.9)
-
Step 900
900 (this color)
#233C45
oklch(34% 0.035 222.9)
-
Step 950
950
#1A292E
oklch(27% 0.022 220.6)
#233C45 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) | #373B45 | 0.028 |
| Deuteranopia (no green cones) | #323745 | 0.025 |
| Tritanopia (no blue cones) | #143F3F | 0.023 |
| Achromatopsia (no color) | #383838 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233C45
#233C45
oklch(34% 0.035 222.9)
- #48322A
#48322A
oklch(34% 0.035 40.8)
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 #233C45, 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
- Onyx #343A40 ΔE 0.024
- Midnight Green #073B4C ΔE 0.026
- Gunmetal #293241 ΔE 0.032
- Charcoal #264653 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.046
Use #233C45 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.